Maybe...

http://support.microsoft.com/default...;en-us;Q110462
ShowDataForm Method Fails If Data Can't Be Found

Lynn wrote:

I am trying to create a database in Excel with headers so that I can enter
new data using the Form feature. I am running Excel 2003. I can create the
named range but when I click anywhere in the range and then select DataForm,
I get an error message that says "Database or list range is not valid." I am
not sure what I am doing wrong.

Lynn

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Dave Peterson