its a bug. i went here and download the 1.4.7 on the bottom of the page. .
the problem is solved.i put the same username and password and i get inside. Maybe before i install v2 i had the 1.4.7 and it updates so it had already my password. i really dont know. its ludei you never know...
edit after updating from 1.4.7 it asked me to log in and it again show me the same error...argggggggggghhhhhhhhhh
i have to tell that after the root of my devices:
alcatel v860 (kitkat version 2.3.7) from 20-30 fps now steady at 30-33
samsung gio gts5660 root and update from 2.3.6 to 4.2.1 cyanogen mode 10.1 from 20-25 fps now at 40+
tablet pipo s1 from 4.1.1 to 4.2.2 from 33fps now to 85-87 fps (huge boost! but maybe the cpu was locked before root i dont know)