I'm running win vista too, but I didn't edit to include any path since it should already associated after successful installation of wamp, and it works perfectly as seen here:
[
test.jlbn.net]
So suggest that you should undo anything you edited, then create a test db account including db, user, and password, then run a small test similar to my test page to check it
Have fun,
[
test.jlbn.net] (Sample Testing Coades for PHP, MySQL, ASP.net, SQL, JSP)
[
www.jlbn.net] (Basic Guide for WAMP & Add-ons)