I burnt a movie to dvd. There where no errors in ConvertXtoDVD, but when I played the dvd it stopped with about 25 minutes left. Anyone know why?

Please post your conversion log, which can be found here: C:\Documents and Settings\<User>\Application Data\VSO\ConvertXtoDVD.log

1/21/2007 7:23:59 AM info ********** Report session closed ***********
1/21/2007 7:22:54 AM info Media removed. Burning layer not ready to write
1/21/2007 4:07:21 AM info Folder C:\Documents and Settings\admin23\My Documents\ConvertXtoDVD\Goodfellas\ has been removed
1/21/2007 4:07:19 AM info Finalization Time 00:00:40 - Total completion time 01:56:37
1/21/2007 4:06:39 AM info Write finished in 01:55:57 - Finalization start here. Avg. burn rate 0.43
1/21/2007 2:10:55 AM info Lead-in burning time (mS) 13564
1/21/2007 2:10:41 AM info Write started 1856576 sectors to write
1/21/2007 2:10:41 AM info Init success: DVD-R packet writing
1/21/2007 2:10:41 AM info Writing speed requested x4.0, effective x4.0
1/21/2007 2:10:38 AM info Available write speed: 16x, 12x, 8x, 4x
1/21/2007 2:10:38 AM info Media ID: RITEKF1
1/21/2007 2:10:38 AM warning VTS_01_0.IFO/BUP reallocated to keep DVD VIDEO structure compatibility
1/21/2007 2:10:38 AM info Scanned files #9, folder #2 - total size 3801153536 b. (3.54 Gb.)
1/21/2007 2:10:38 AM info Inserted media type : DVD-R
1/21/2007 2:10:38 AM info Write started
1/21/2007 2:10:37 AM info --------------Encoding end--------------
1/21/2007 2:10:37 AM info Media name: "."
1/21/2007 2:10:37 AM info Burned folder: "C:\Documents and Settings\admin23\My Documents\ConvertXtoDVD\Goodfellas\"
1/21/2007 2:10:20 AM info New media inserted. Burning layer is ready to write
1/21/2007 2:10:18 AM info Compatible media types : DVD-R, DVD-RW Seq., DVD-RW RO, DVDRAM, DVD+R, DVD+RW, CD-R, CD-RW, DL DVD+R, DL DVD-R
1/21/2007 2:10:18 AM info New Drive selected : 16:0:0 - SONY DVD RW DRU-830A SS22 [F] (Usb)
1/21/2007 2:10:18 AM info Total size in built folder 3625 Mb., Target size DVD5 4400 Mb., Occupation 82.39%
1/21/2007 2:10:18 AM info Conversion completed in 05:48:11
1/21/2007 2:10:18 AM info Generated duration 8731.11 sec., expected 8731.82 sec.
1/21/2007 1:15:11 AM info Chapter #30 start at 144:59.691
1/21/2007 1:07:01 AM info Chapter #29 start at 139:59.891
1/21/2007 12:56:56 AM info Chapter #28 start at 135:0.092
1/21/2007 12:46:38 AM info Chapter #27 start at 129:59.792
1/21/2007 12:36:35 AM info Chapter #26 start at 124:59.992
1/21/2007 12:25:55 AM info Chapter #25 start at 119:59.825
1/21/2007 12:15:01 AM info Chapter #24 start at 115:0.026
1/21/2007 12:04:36 AM info Chapter #23 start at 109:59.976
1/20/2007 11:54:13 PM info Chapter #22 start at 104:59.676
1/20/2007 11:44:02 PM info Chapter #21 start at 99:59.877
1/20/2007 11:33:44 PM info Chapter #20 start at 94:59.827
1/20/2007 11:23:13 PM info Chapter #19 start at 90:0.027
1/20/2007 11:12:56 PM info Chapter #18 start at 84:59.727
1/20/2007 11:02:43 PM info Chapter #17 start at 79:59.678
1/20/2007 10:52:40 PM info Chapter #16 start at 74:59.878
1/20/2007 10:42:39 PM info Chapter #15 start at 69:59.828
1/20/2007 10:32:20 PM info Chapter #14 start at 65:0.279
1/20/2007 10:22:05 PM info Chapter #13 start at 60:0.096
1/20/2007 10:11:56 PM info Chapter #12 start at 54:59.796
1/20/2007 10:01:37 PM info Chapter #11 start at 49:59.629
1/20/2007 9:51:09 PM info Chapter #10 start at 45:0.080
1/20/2007 9:40:28 PM info Chapter #9 start at 39:59.780
1/20/2007 9:30:05 PM info Chapter #8 start at 34:59.730
1/20/2007 9:19:40 PM info Chapter #7 start at 29:59.931
1/20/2007 9:09:41 PM info Chapter #6 start at 24:59.881
1/20/2007 8:59:50 PM info Chapter #5 start at 20:0.082
1/20/2007 8:49:21 PM info Chapter #4 start at 14:59.899
1/20/2007 8:38:48 PM info Chapter #3 start at 10:0.099
1/20/2007 8:28:22 PM info Chapter #2 start at 4:59.682
1/20/2007 8:22:07 PM info Stream #1 Sync. delay : 0.00 ms
1/20/2007 8:22:07 PM info Stream #0 Sync. delay : 0.00 ms
1/20/2007 8:22:07 PM info Output Stream#1 - Audio: ac3, 48000 Hz, stereo, 192 kb/s
1/20/2007 8:22:07 PM info Output Stream#0 - Video: mpeg2video, yuv420p, 720x480, q=1-31, 3873 kb/s
1/20/2007 8:22:07 PM info Video Stream #0 Pulldown : 23.976 -> 29.97 Fps
1/20/2007 8:22:07 PM info Video source original frame rate: 23.98
1/20/2007 8:22:07 PM info NTSC 29.97 FPS output format set by user
1/20/2007 8:22:07 PM info Widescreen (16:9) set automatically
1/20/2007 8:22:07 PM info Video bitrate 0/3873/8308 Kbps (min/avg/max)
1/20/2007 8:22:07 PM info Converting "C:\Documents and Settings\admin23\Desktop\Goodfellas.avi"
1/20/2007 8:22:07 PM info ----------------Title #1----------------
1/20/2007 8:22:07 PM info Project size 4.3 Gb. (200 Mb. audio - 4.1 Gb. video)
1/20/2007 8:22:07 PM info Stream #1 - Audio: mp3, 48000 Hz, stereo, 128 kb/s
1/20/2007 8:22:07 PM info Stream #0 - Video: msmpeg4, yuv420p, 512x272
1/20/2007 8:22:07 PM info 2 Stream(s) found - est. duration 02:25:31.815
1/20/2007 8:22:07 PM info Opening file "C:\Documents and Settings\admin23\Desktop\Goodfellas.avi"
1/20/2007 8:22:06 PM info [ ] Don't fix audio gaps
1/20/2007 8:22:06 PM info [ ] Engine Log
1/20/2007 8:22:06 PM info Encoder quality: 100%
1/20/2007 8:22:06 PM info --------------Encoding begin--------------
1/20/2007 8:22:06 PM info --------------Menu settings end--------------
1/20/2007 8:22:06 PM info [ ] Menu
1/20/2007 8:22:06 PM info --------------Menu settings begin--------------
1/20/2007 8:22:06 PM info --------------Default burn settings end--------------
1/20/2007 8:22:06 PM info Default speed selected: 4x
1/20/2007 8:22:06 PM info Compatible media types : DVD-R, DVD-RW Seq., DVD-RW RO, DVDRAM, DVD+R, DVD+RW, CD-R, CD-RW, DL DVD+R, DL DVD-R
1/20/2007 8:22:06 PM info New Drive selected : 16:0:0 - SONY DVD RW DRU-830A SS22 [F] (Usb)
1/20/2007 8:22:06 PM info [X] Delete files after burn complete
1/20/2007 8:22:06 PM info [X] Don't eject after burn complete
1/20/2007 8:22:06 PM info [ ] Prefer SAO for DVD-R
1/20/2007 8:22:06 PM info [ ] Include originals
1/20/2007 8:22:06 PM info [X] Burn result to DVD
1/20/2007 8:22:06 PM info --------------Default burn settings begin--------------
1/20/2007 8:21:05 PM info User default language : 1033 (0x0409h) - English (United States)
1/20/2007 8:21:05 PM info System default language : 1033 (0x0409h) - English (United States)
1/20/2007 8:21:05 PM info Version 2.1.8.193
1/20/2007 8:21:05 PM info ExeName : "C:\Program Files\vso\ConvertXtoDVD\ConvertXtoDvd.exe"
1/20/2007 8:21:05 PM info OS : Microsoft Windows XP Professional Service Pack 2 (Build 2600)
1/20/2007 8:21:04 PM info ******************** Report session started

Something wrong with your burner or your system was under heavy load when burning.
Burning was VERY slow - 0.42x
Try SAO mode when burning, change it from settings, also check that your USB burner is connected to USB2 -bus instead of USB1.

I'll try that SAO mode next time. I don't have a USB 2.

USB 1.1 has theoretical max speed of 12Mbits - that means data transfer of 1.4MBytes/second.
Usually USB 1.1 port can not achieve that maximum, even half of it is good.

Writing DVD with 1X speed requires 1.32MB/sec, and 4x (as your log shows) requires 5.28MB/sec.
Your burner is not getting data it needs, and it can not burn reliably.
This alone could cause your problems.