/dev/mouse no longer working

Hi All, I've got SuSe Enterprise Server 8.0 setup on our new server. Since yesterday the mouse no longer works. X Windows goes to start up and then aborts and gives... InputSection Device Mouse[1] must have a driver line. This was occurding yesterday and the sym link of /dev/mouse was no longer there. I've since then created this link manually and it once worked but X has incorrect guessed the type wrong and made the x and y movements to high so it was very hard to use the mouse. Now I can't get it working at all. Running X Setup doesn't appear to work either. Any ideas or suggestions?