I can only try to help you, but this solved my problem:
try to uncomment these two lines:

#/sbin/modprobe hid
#/sbin/modprobe usbmouse

in /etc/rc.c/rc.modules.
Try this way and let me know if it works...
Bye

p.s. more information in the HowTo "Getting your optical wireless
intellimouse explorer to work in Slack", on Linuxquestions.org