|That message means you're running MEM from a different dos version than is currently booted on your system. So first thing you should do is tell us what two versions of dos are involved here.|
And MEM isn't going to work. I just ran it from command prompt on XP and it only showed the first meg of ram. You'll need a dos-based third party utility.
Oh, and when you say 'card' I assume you mean system RAM.