AutoCAD 2004 and OEM 2004 based products (for example: Carlson Software
2004, AgStar 2004, CSI 2004 and Autograde 2004) are not supported by
Autodesk with Windows 95, 98 and ME (all editions). Windows NT is supported
with service pack 6a. 

Most of the time the products will install successfully and will run, but
we have seen a limited amount of users who experience random crashes in
parts of product beyond our control. 

It is therefore recommended that users, who have these versions of Windows
and wish to use our AutoCAD 2004-based products, consider upgrading their
computers to run at least Windows XP Home. If the computer power is
adequate the cost of this upgrade is around $100.

Thank you,
Carlson Software Support Team.