Printer Sharing Problem

I have a windows 98 machine behind a SBS2000. After
placing this computer as a user on SBS2000 and running the
Outlook 2002 upgrade, I can no longer share my printers.
When I try to share them I am told I need to add users. I
click ok, and then I receive an error stating that "Either
there is no default mail client or the current mail client
cannot fulfill the messaging request. Please run Microsoft
Outlook and set it as the default mail client."

Has anyone ever run into this? I need help.

Thank You
Marty Walter
Capitol City Telephone