I believe you can fire up the MySQL query browser, and select your database and enter the following command in the query box
Code:
UPDATE account
SET status='250'
WHERE name='usrname'
Where it says usrname put in the name of the account that you want to have the status set too. This works for me so give it a shot. Thers is probably a simpler solution to this, but I just pulled this out of the MySQL syntax help stuff.