excel 2000 and win XP home

I am having problems with excel crashing and giving me that horid error
report.
It happens when I want to add a new procedure using Insert, Procedure.
I have run the Office CD to repair any damage but it still occurs. I have
also received an error report once(twice now) when shutting down excel.
I am not running any other programs and have had no other problems in the
five months I have had the AMS XP2400 processor with Win XP.
Any help would be greatly appreciated.
Ta,
Martin