Open Multiple Drawings at One Time

[scameron]

I run Carlson 2010 on AutoCAD Land Enabled Map 2002 but cannot switch off Single-Drawing Compatibility Mode under the options->system->General tab (option is checked but not available). SDI toggle is preset to "2" despite it being a 0/1 toggle. Can't set it to 0/1 manually. Any suggestions?

[site admin]

You might try doing a search on Autodesk's web forums as this is controlled by them.