I can delete, add, but not update

[Chip Wiegand]

I don't know for sure, but I think I may have something wrong with 
permissions in MySQL. I have some web forms from which I can add new data 
and delete data. But when I try to do an update of existing data the data 
is not actually changed. Is it possible that the permissions are not set 
up correctly in MySQL?
Thanks,
Chip Wiegand
Computer Services
Simrad, Inc
425-778-8821 
425-771-7211 (FAX)