2003 .ade "unrecognized format" error

[T.J.]

I had a 2000 .adp file that I converted to a 2003 .adp file. It converted
correctly to 2003 and works perfectly. The code compiled and I then created
a .ade file. The .ade file created without any errors.

But when I try to open the .ade file I get the error:

"The database is in an unrecognized format"

and then it never opens. I have opened up MS Access 2003 and then file ->
Open the .ade file and it still gives me the error.

Has anyone had this problem before, and if so, is there a fix for it?

Thank you for your time,

T.J.