I copied lots of movies until recently. The copies that I make play good in the dvd player until the middle of the movie, where the screen freezes and cannot move. I tried other dvd players and found the same problem. The movies that I copied were all new and not dirty. What could be the problem? Thank you for your help!!

What media are you using and what dvd drive. Use dvd identifier to get that information.

Post a burn session or two from your CopytoDVD log .
Open 1Click >> F7 = CopytoDVD log >> Copy and Paste in reply .
Look for 'Session Started/Session Closed" to divide sessions .

This will give us a lot of useful info .
First Off -- Sounds like "poor" media Quality and / or Burning it TOO fast .
Your log will tell us more.

The media I use is TDK DVD +R




6/17/2006 7:41:32 PM info ******************** Report session closed *********************
6/17/2006 7:41:31 PM info Write completed
6/17/2006 7:41:31 PM info Average speed x8.74 Reference x1 = 1385.00 kbps
6/17/2006 7:41:31 PM info Total burning time 00:06:23.844
6/17/2006 7:35:22 PM info Lead-in burning time (mS) 17648
6/17/2006 7:35:04 PM info Start Write Buffer
6/17/2006 7:35:04 PM info Start writing...
6/17/2006 7:35:04 PM info Buffer under-run proof enabled
6/17/2006 7:35:04 PM info Writing speed requested x16.0, effective x16.0
6/17/2006 7:35:04 PM info Writing session #1 and closing disc.
6/17/2006 7:35:04 PM info Open Image file "C:\Documents and Settings\\Application Data\CopyToDvd\COPYTODVD_06172006_193504_533.cache"
6/17/2006 7:35:04 PM info Required sector size : 2253408
6/17/2006 7:35:04 PM info Available sector size : 2295104
6/17/2006 7:35:04 PM info Available write speed: x16.0, x12.0, x8.0, x4.0
6/17/2006 7:35:04 PM info Media ID: CMC MAG-M01-00
6/17/2006 7:35:04 PM info 120mm DVD
6/17/2006 7:35:04 PM info Detected media $001B : DVD+R
6/17/2006 7:35:04 PM info Finished browsing files - Data size 4.3 Gb.
6/17/2006 7:35:04 PM info File scan complete: 10 files, 3 directories
6/17/2006 7:35:04 PM info Start Browsing file structures
6/17/2006 7:35:04 PM info IDE Controler manufacturer : Intel
6/17/2006 7:35:04 PM info IDE Controler Description : Intel(R) 82801FB/FBM Ultra ATA Storage Controllers - 266F
6/17/2006 7:35:04 PM info Location : PCI bus 0, device 31, function 1
6/17/2006 7:35:04 PM info IDE Controler manufacturer : Intel
6/17/2006 7:35:04 PM info IDE Controler Description : Intel(R) 82801FB Ultra ATA Storage Controllers - 2652
6/17/2006 7:35:04 PM info Location : PCI bus 0, device 31, function 2
6/17/2006 7:35:04 PM info Support Media : DVD-R, DVD-RW Seq., DVD-RW RO, DVD+R, DVD+RW, CD-R, CD-RW, DL DVD+R
6/17/2006 7:35:04 PM info Writing device used : 0:1:0 - HL-DT-ST DVD+-RW GWA4164B D108 [E] (Ide)
6/17/2006 7:35:04 PM info Using Patin-Couffin driver Version 1.35, Internal revision 35 - Async. Access mode
6/17/2006 7:35:04 PM info Using DVD Video creation mode.
6/17/2006 7:35:04 PM info ParamStr 5 = "/1C=4.2.9.2-D41D"
6/17/2006 7:35:04 PM info ParamStr 4 = "/volumename=GGE0NNW1"
6/17/2006 7:35:04 PM info ParamStr 3 = "/dvdvideo=C:\Documents and Settings\\Application Data\ 1ClickDVDCopy\1ClickDvdCopy\VIDEO_TS"
6/17/2006 7:35:04 PM info ParamStr 1 = "/writedevice=E"
6/17/2006 7:35:04 PM info ParamStr 0 = "C:\PROGRA~1\LGSOFT~1\1CLICK~1.2\CopyToCd.exe"
6/17/2006 7:35:04 PM info User default language : 1033 (0x0409h) - English (United States)
6/17/2006 7:35:04 PM info System default language : 1033 (0x0409h) - English (United States)
6/17/2006 7:35:04 PM info Version 3.1.1.135
6/17/2006 7:35:04 PM info ExeName : "C:\PROGRA~1\LGSOFT~1\1CLICK~1.2\CopyToCd.exe"
6/17/2006 7:35:04 PM info OS : Microsoft Windows XP Professional Service Pack 2 (Build 2600)
6/17/2006 7:35:04 PM info 32 bits native system
6/17/2006 7:35:04 PM info ******************** Report session started ********************
6/14/2006 6:32:43 PM info ******************** Report session closed *********************
6/14/2006 6:32:42 PM info Write completed
6/14/2006 6:32:42 PM info Average speed x7.38 Reference x1 = 1385.00 kbps
6/14/2006 6:32:42 PM info Total burning time 00:07:25.719
6/14/2006 6:25:31 PM info Lead-in burning time (mS) 17581
6/14/2006 6:25:13 PM info Start Write Buffer
6/14/2006 6:25:13 PM info Start writing...
6/14/2006 6:25:13 PM info Buffer under-run proof enabled
6/14/2006 6:25:13 PM info Writing speed requested x16.0, effective x16.0
6/14/2006 6:25:13 PM info Writing session #1 and closing disc.
6/14/2006 6:25:13 PM info Open Image file "C:\Documents and Settings\\Application Data\CopyToDvd\COPYTODVD_06142006_182513_296.cache"
6/14/2006 6:25:13 PM info Required sector size : 2214272
6/14/2006 6:25:13 PM info Available sector size : 2295104
6/14/2006 6:25:13 PM info Available write speed: x16.0, x12.0, x8.0, x4.0
6/14/2006 6:25:13 PM info Media ID: CMC MAG-M01-00
6/14/2006 6:25:13 PM info 120mm DVD
6/14/2006 6:25:13 PM info Detected media $001B : DVD+R
6/14/2006 6:25:13 PM info Finished browsing files - Data size 4.22 Gb.
6/14/2006 6:25:13 PM info File scan complete: 10 files, 3 directories
6/14/2006 6:25:13 PM info Start Browsing file structures
6/14/2006 6:25:13 PM info IDE Controler manufacturer : Intel
6/14/2006 6:25:13 PM info IDE Controler Description : Intel(R) 82801FB/FBM Ultra ATA Storage Controllers - 266F
6/14/2006 6:25:13 PM info Location : PCI bus 0, device 31, function 1
6/14/2006 6:25:13 PM info IDE Controler manufacturer : Intel
6/14/2006 6:25:13 PM info IDE Controler Description : Intel(R) 82801FB Ultra ATA Storage Controllers - 2652
6/14/2006 6:25:13 PM info Location : PCI bus 0, device 31, function 2
6/14/2006 6:25:13 PM info Support Media : DVD-R, DVD-RW Seq., DVD-RW RO, DVD+R, DVD+RW, CD-R, CD-RW, DL DVD+R
6/14/2006 6:25:13 PM info Writing device used : 0:1:0 - HL-DT-ST DVD+-RW GWA4164B D108 [E] (Ide)
6/14/2006 6:25:13 PM info Using Patin-Couffin driver Version 1.35, Internal revision 35 - Async. Access mode
6/14/2006 6:25:13 PM info Using DVD Video creation mode.
6/14/2006 6:25:13 PM info ParamStr 5 = "/1C=4.2.9.2-D41D"
6/14/2006 6:25:13 PM info ParamStr 4 = "/volumename=BADNEWSBEARS_2005_WS"
6/14/2006 6:25:13 PM info ParamStr 3 = "/dvdvideo=C:\Documents and Settings\\Application Data\1ClickDVDCopy\1ClickDvdCopy\VIDEO_TS"
6/14/2006 6:25:13 PM info ParamStr 1 = "/writedevice=E"
6/14/2006 6:25:13 PM info ParamStr 0 = "C:\PROGRA~1\LGSOFT~1\1CLICK~1.2\CopyToCd.exe"
6/14/2006 6:25:13 PM info User default language : 1033 (0x0409h) - English (United States)
6/14/2006 6:25:13 PM info System default language : 1033 (0x0409h) - English (United States)
6/14/2006 6:25:13 PM info Version 3.1.1.135
6/14/2006 6:25:13 PM info ExeName : "C:\PROGRA~1\LGSOFT~1\1CLICK~1.2\CopyToCd.exe"
6/14/2006 6:25:13 PM info OS : Microsoft Windows XP Professional Service Pack 2 (Build 2600)
6/14/2006 6:25:13 PM info 32 bits native system
6/14/2006 6:25:12 PM info

and I'd say that's pretty much the problem ,
the CMC MAG-M01-00 media code is considered very 'poor quality'

Try decreasing the burn speed to 8x .. and you should have better results .
( You're not burning much above that anyway )

Try some better media ... TYs or Verbatim

Also .... Update your 1Click ( Updates are free )
Current Version is 4.2.9.11
http://www.lgsoftwareinnovations.com/download.asp

6/14/2006 6:25:13 PM info Writing device used :
0:1:0 - HL-DT-ST DVD+-RW GWA4164B D108 [E] (Ide)
You could also update your firmware ...

This burner came with your Dell , right ?
http://forum.rpc1.org/dl_firmware.php?download_id=2279

If not ,>> Go to Your computer manufacturers support site
and check on a firmware update