Hi, I have a new cpu with OS Windows 7, I installed autocad 2007 and it works in standard autocad, but it doesnt open in cad overlay showing "fatal error: unhandled e06d7363h Exception at 7791b727h". I can open the drawings but i cannot use any command or button. When the fatal arror message shows and i hit cancel it closes the drawing. Is the win7 64-bit not compatible with archibus afm18?