Outlook version? Outlook doesn't "install" forms normally, so please tell us
the steps you're taking and the full text of the error message.
Database?
FYI, there is a newsgroup specifically for Outlook forms issues "down the
hall" at microsoft.public.outlook.program_forms or, via web interface, at
http://www.microsoft.com/office/community/en-us/default.mspx?dg=microsoft.public
.outlook.program_forms

Signature
Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> I'm using a custom form to manage clients but I keep getting "custom form
> cannot be installed...." and the contact opens using the default form
[quoted text clipped - 5 lines]
> explaining it to the people who use the database. Is there a patch to fix
> this?