Whoever set up your BB connection would have given or told you your user ID and password. Check your paperwork. If you can't find it, give them a ring. They will ask you a few questions which if you answer correctly, they will then give or email you a new password.
Have you tried that link I gave you, danny0001uk? It works on XP for dialup connections, it should also work for your BB connection. click here , but if it doesn't you'll have to, as pj123 said, find out the security question, and answer, that the person who set up the connection supplied to F2S. Then give F2S a ring.