Apologies for again being on asking stoopid questions on this one but I cant seem to get the verifyLogin method to work correctly i.e. I have set up my table

CREATE TABLE visionire
(username VARCHAR(30) NOT NULL,
password VARCHAR(30) NOT NULL,
IP VARCHAR(20) NOT NULL,
PRIMARY KEY (username));

and added a row however when I run the script and try and log in the following query always returns no rows:

$query = sprintf("SELECT * FROM user WHERE username = '%s' AND password = sha1('%s') LIMIT 0,1", $this->clean($username), $this->clean($password));

If i rewrite the query and hardcode the user details it works ok so I am assuming its something to do with the way i have defined the columns on the table or how the strings are handled i dunno any experts out there who can spot an error?

Cheers.