Do someone have a device or know how to make it works under vista?
Unfortunately the 712A is not one of the drives listed on Plextor's Vista compatibility chart here.
Strange, I've been using PX-712 with 32&64 bit Vista (Beta, RC1&2 and RTM) without problem...
Derick, what firmware are you running? Maybe try to update to the latest (if you aren't already) on a different machine and then try the drive again in the Vista machine if possible.