installing MS PS/2 mouse Debian Linux2.1

[William Smith <WSmith@gensym.com>]

After installing Debian Linux2.1 I tried installing X11 but get an error : 

"Fatal server error: Cannot open mouse (Operation not supported by device)"

there is no /dev/mouse device installed and when I try using modconf to
install an MS Bus Mouse I get an error :

"/lib/modules/2.2.12/misc/msbusmouse.o: init_module: Device or resource
busy.  Installation failed"

any suggestions?

Bill