I loaded AutoCAD Freestyle last night, Monday, 12/27/2010 from a CD. When I start the program I get an error message that says "Heidi Module Load Error", "The configured Heidi Driver cannot be loaded - switching to default software driver". I am using NVIDIA GeForce 315 with the newest driver (just upgraded today, 12/28/2010). I reset my resolution to 1280 x 768 and I checked to make sure the "Direct Draw Acceleration" is enabled. I am running Windows 7 Professional on a HP Pavillion Elite 410t. Any ideas why the Heidi Driver won't load?