The AM is right, you should have a DBD driver defined between the first and the second colon.

Assuming your perl code runs on Windows... I think the easiest way is to use the DBD::ODBC driver. Make a System-DSN to your database, with the "32-bit ODBC data sources" control panel from Windows, and use the name you gave it there, as the third part for your connect string. If that name was "Foo" (just a silly example :-) ), the connect string can then look like:

   "DBI:ODBC:Foo"
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