[newbie] Fatal Server Error

[James]

I am using Mandrake 6.1 and when I try to use "startx" it tries to start
the X windows.. but crashes and gives me the message:

Fatal server error:
Cannot open mouse (no such device)

I have been using Xwindows just fine for the last few days.. suddenly it
can't see the mouse?  What might be wrong?

Thanks.

james