When I try to run Gunship 2000 on my machine I get an error that I could barely manage to read before the window closes out on me.

Here is the error: "CPU:GRP5: ILLEGAL CALL 7"

This is with .061 and all config settings at defult.

I am running windows xp on an Asus Granite Bay Board with a p4 2.66 northwood at stock speed.

Any Ideas what this error is?