Uhh... Help.... Nero Question/Problem

Im trying to burn a Nero image and it says that, "Writing several sessions at once has to be used to make an exact copy of this multisession CD." It goes on about saying that my CD-RW drive may not be able to handle it. Then it says, "Really use Disk-At-Once instead of Track-At-Once to produce a more accurate but less compatible disc?" Then I can choose Yes, No, or Cancel.... What should I do?!?!?! If my problem is not described well enough a pic of the warning dialog is here: http://www.geocities.com/bph12.geo/warning.jpg