I did a comparison, and your connection string is different
than mine. Mine does not show any password/userid entries, but
perhaps that's the difference between using SQL and SQL Express.
(I'm using SQL.) I am, of course, assuming that you have actual
values for "servername," "database," etc.
Given that you can't get in from RSC Explorer, it would seem
that either you are not using the same userid/password as the one
you set up for the administrator when you created the DB, or else
there's something wrong with the DB itself.
Try creating a test DB. Be careful to specify the same
administrator name and password as the login you use to get on the
RSC server. After you've created the test DB, open it up from RSC
Explorer. If you can do this successfully, then everything ought to
be working OK. From that point, I'd start over and create a new DB,
and upload to that one. (In fact, I've actually gone through
exactly that total exercise before.

)
G