For now it only works mounted in Daemon Tools 4.06 and latest YASU. This is because of SecuROM blacklisting Daemon Tools and Alcohol virtual drives. The fact that it works using DT 4.06 is probably due to a bug in SecuROM, so there is a chance that some future patch for the game will include a newer version of SecuROM, which also blacklists DT 4.06.

Consider using DT 4.06 as a temporary workaround until an update for Daemon Tools or Alcohol is released.