update mysql using radio button

hello all - i'm having a problem getting an UPDATE to work with radio buttons and i'm not sure where it's gone wrong. the initial values are being grabbed properly, but unfortunately they don't want to get updated. the regular text form values update just fine. would appreciate some help. the html: <input type=hidden name="id" value="<?php echo $id ?>"> club member?<br> No: <input type="radio" name="club_member" <?php if($row->club_member == 'N'){echo 'CHECKED';}?>><br> Yes: <input type="radio" name="club_member" <?php if($row->club_member == 'Y'){echo 'CHECKED';}?>> the query to update: $query = "UPDATE outdoor SET name='$name', email='$email', zip='$zip', club_member='$club_member' WHERE id='$id'"; $result = mysql_query($query) or die ("Error in query: $query. " . mysql_error()); [trying to keep the code paste to what i think is important, let me know if more is needed for info.] thanks! m.