VMWare Failed Unexpectedly

For over 6 months I have been running VMWare Express 2.0.4 - Build 1133 with little or no problems. Yesterday it was running OK, but today when I clicked power on I received the following error message: "Could not open. Please make sure that the kernel module 'vmmon' is loaded. (/dev/vmmon). Module 5 power on failed." I can't find any info about this on VMWare's site. Does anyone here have any ideas on what may have caused this problem and more importantly how do I fix it ? TIA Dave SuSE 7.3 kernel 2.4.10