u might need non MD5 joinserver for your server side .. or try making account with 'Account create (MD5)' or mumaker.. or website..
problem clearly with database password algorythm / MD5 or not
something not matching, if in Database>memb_info> design > password = varbinary then u need a joinserver.exe thats MD5 if its varchar then u need a joinserver thats NON MD5