Joomla 3.3.0 passwords issue

Hi I have updated my Joomla! 3.3.0 Stable and passwords are not recognized. I've tried to reset from phpMyAdmin in y5kdp_users username and password and tried to login from the back end still not working, can you help me. Thanks

Hi,
First, did you set extra protect layers before upgrade (default from Joomla or from plugins) ?
Second, we don't deal in such a problems which are not associated with templates or our modules.
So you have two/three options:
1) Recover old Joomla from backup
2) Search answer on official Joomla forum
3) Hire somebody which will help you manage