cant login on cabaltoolz v4

Im using ep2 database Christmas
I register using cabaltoolz v4.. and after that I can't login
on the site.. im using xampp v1.7.7

EDIT:
I try also xampp 1.7.1 .. still can't login

http://forum.ragezone.com/f451/help-...ltoolz-898896/

try xampp 1.6.6.a