encrypt/decrypt user password in database

[holy_knight]

Pls help me. Some user attack my web site and they used my password to take admin account and they change my admin password and others password and now i can't access admin part of site. I have access to my phmypadmin and database on the web site. Could someone tell me how i could change password of users on table cms_users that i could log in. Is this possible practically? I was used md5 and sh1 function even try to copy from localhost database data from field password and to use password for logging but that isn't work. If it couldn't answer publicly  pls admins or someone who knows to solve this problem contact me via private message...
p.s. sorry on bad english

[NaN]

Did you try the FAQ section?

http://wiki.cmsmadesimple.org/index.php ... d_password

[holy_knight]

I changed field active in table users to 0 and because of that it couldn't work using md5 function. Anyway now is all right. Thank you very much...