Try this out:
In a terminal window
1. type 'su' and give your root password
2. type ' vi /boot/grub/grub.conf ' (we'll add a line to your bootloader, if you are using grub, that is)
3. add ''psmouse.proto=imps" at the end of the line that starts with: "kernel /vmlinuz ...."
4. exit ( you exit byhitting esc, then typing ":wq" , with the colon )
It might work.
I hope I'm not offending you. I really don't know how much you know about linux.