What version of Microvellum, AutoCAD and Vista (ultimate, business, etc.)? And, where has the MV Toolbox docked? Where do you want it?
I'm running Microvellum Ver. 6, AutoCAD 2004 and Vista business. I had to talk to customer service to help me tweek my settings to get everything working right when I installed everything on the computer. I'll try to you as much as I can.