Forgot pasword for anti theft

Hello, i relly need help here. just recently change my sim card.
then when i turn on the phone, it was locked. i forgot the password.
then i have try to open it via your mobile avg website but i cannot login because the site keep telling me wrong username/password. i already change/reset the password but until now i cannot login to the site.
im using sony xperia e4 phone

Togi, Don't know if this will help?.. Have a look @ this article (http://avgclick.me/LockedPhone). Otherwise, Please click on the following link (http://avgclick.me/AVGtechnical) and fill out your details, select as Android then the name of AVG Program that you installed in your mobile and in description please completely explain about your issue and finally click on Email option. The AVG mobile team will reply back to you via email with a resolution.
AVG Guru