I have many 2003 spreadsheets with macros.

I just tried to load one of them inot 2007.
I Opened the File, then Saved it as .xlsm file. Then I closed it ant opened
it.
I tried to run my macro and got the message "Can't find Project or Library."

Dim rstring As String
rstring = "A" + Trim(Str(r1)) + ":G" + Trim(Str(r2)) where str is highlighted.

Any thoughts? If I have to convert/upgrade these programs, is there any
utility or tutorial on what to do?

Thanks