Reset Script doesnt work

Hi guys, i forgot my pass and ended up looking for a way to reset it. Found an sql dump that resets it somewhere on the web however when i login and click on any of the admin links it throws me back to the login interface page!

So i deleted the password from phpmyadmin so that i can login without a pass, worked but it still doesnt let me click on any of the links....so my final choice was to download the reset script but that doesnt work either! I get to the MYsql password submit page (mysite.com/gb/reset.php) and when i submit i get

"Could not reset the username and password because: "

with no reason, just blank white space.....can someone help me please

?