(Smacks forehead) Oh, bloody hell. Did you install the ProCows off the release version of the VuePro CD? If so, that's your problem. The ProCows on the release run were busted, broken, bad juju. Someone put an earlier build of the ProCow on the gold master, instead of the proper one. They simply didn't work, nor would they auto-update. Look in your VuePro folder for the RenderCow update executable, copy it to flash drive or CD (I think it's too big for floppy), and manually update the Cows one at a time (if there's one on your main system, then click on it and update that Cow, then test and see if that solves your problem). Once they are updated to a working build, they -should- be fine.