On a side note:
There are two methods of using Msql-Mysql-modules. You can use it as DBD::mysql (as btrott pointed out), or you can use it in native mode.

Although you may feel tempted to, I would recommend against using it in native mode. Sure you get a few new features like $sth->query() without having to prepare() and execute(), but in the long run it prooves to be a bad habbit since you can't easily port your applications to other DBMS's...

Cheers.