Well,
If you're trying to log-in to EQ2, its not a problem with EQ2MAP.
So, a few questions:
First: Can you log-in on the SOE forums properly with that same account?
If yes, then the problem must lie with Launchpad, or you're entering something wrong.
If no...
Have you used SOE's online system to recover your password? You can find it at this link:
https://www.station.sony.com/secure/...e/password.jsp
If no, try that.
If yes...
Could you reset your account?
If yes, try using that info.