Using phpMyAdmin change the password field in the database for your admin user to:
Text Formatted Code
5f4dcc3b5aa765d61d8327deb882cf99
This will change your password to:
password
You should then be able to log in at that point using password as your passowrd but you should then go and change your password right away to something else (using the admin users form).
Tom
One of the Geeklog Core Developers.