Vista Home Premium 32 / Outlook 2007

I have created some forms that used to work. No more.
On selecting a Contact form, I get "The form required to view this
message cannot be displayed. Contact the administrator." All other
forms appear to work. To my knowledge, I am the administrator. This is
a stand-alone PC in my residence. If I go to Manage User Accounts, it
shows only 2 accounts - LastName Administrator and Guest.
I have googled my problem and found references to FRMCACHE.DAT which I
am told to delete and restart Outlook. Did that. Opened Outlook and
tried to open a form. Same error. And FRMCACHE.DAT was not rebuilt.
Doing 'Find' shows no such file.
FWIW, I can open the file in 'Design Form' and edit and publish.
This is the first Form problem I have ever had in Outlook. How do I
get rid of the error? I think I have switched Contacts to use the
default form and I still get the error.
BONUS QUESTION: Is there a way to point Outlook to a NEW default
folder that contains all my forms?