PHP & MySQL problems, updating database..

Having a problem with this, I have a working login that supports multiple users, and I'm trying to make it possible for the users to change their own settings etc, but I get killed when trying to send the data to the MySQL database. To connect I use mysql_connect($host,$user,$pswd) and mysql_select_db($db) the retrieving data from the form works since I belive, since it showed up when I added a print "$the vars " but I don't know how to save it to the database.. I might be missing some line or maybe it's just because I'm a newbie or something.. ;D anyway.. I use something similiar to this $query = "UPDATE users SET email='$email'"; // and so on.. $result = mysql_query($query) or die ("blabla"); I don't get any error lines or anything, the only thing that shows is the "blabla" thing. I also tried INSERT INTO in the query but that didn't make any difference :p if anyone could tell me what I'm doing wrong I would be happy.. :p "the best way to learn is to ask people that know" :p Hawk