It is Q to open command menu, M to go to Menu of the command menu, P to request a new password, and ( now I don't remember ) it asks you to confirm with button S. Anyway it should give you a password of a few signs (4 maybe, I don't tremember lol... ) You have to write down that password and use it to log in.
If you use the proper password then maybe the login is wrong? Have you tried requesting password on an official server like crpg_1 or somewhere else?