3550A won't burn Disc-at-Once

Hi, I’ve had my 3550A for a year now but just built a new Core 2 Duo rig to put it in. The only burning software I’ve tried so far is CD Burning XP Pro 3, and for some reason, when I try to select Disc-at-Once in the Write menu, it says that’s not supported on this drive. Well, it was on my last computer, so I don’t know what’s going on. Firmware is 1.06 official.

Could be an issue with the burn application. Try Ashampoo or Nero 6. Nero 7 is too PORKY of an application.