I can't open the layer propertie manager. I get error message Exception in acmgd.dll ARX Command,  Unhandled exception E0434F4D. I removed and reinstalled Autocad, removed and reinstalled Net 1.1 and Net 2.0  and still get the error. I ned some help!!! Thanks in advance. Bob

Probably a problem in the .NET Framework 2.x installation or a virus problem. See also:
http://discussion.autodesk.com/thread.jspa?messageID=4940941