Forgotten password

Hello, i changed my password on my samsung S8300 today, i then turned my phone off, when i turn my phone on it asks for a phone lock, it doesnt except my old password and i forgott my new one,
i have tryed putting in the codes *2767*3855#

*2767*2878# but they havent worked, do you know of any other way i can get in? its is urgent!