Hi! You can easily use an existing ODBC connection on windows by just installing DBD::ODBC.

From the OP I can't see whether he has an existing, functioning ODBC connection or not.
To rule that out, I'd try to connect to the database from a "standard" tool (first via "native" Driver, then via ODBC).

BTW in your gist, this should go into the missing 01_setup_Windows.md :-)

Your cue about 32- vs. 64- bit is very important. From my last adventure in this area ISTR that Google (or even perlmonk's Super Search) had all necessary info about this point, but of course I didn't write it down :-/