submitting to php from a button

[fife]

how do you submit a form from a button?  I have the code below just to check my form is submitting and its not.....

if(isset($_POST['clubinsert'])){	
echo "It worked!";
}



<form action="" method="POST" id="myclubfrm">
        
       <input  type="image" src="<?php  if ($CP['logo']=='logo_default.jpg') 
					{ echo "../images/logo_default.jpg"; }
   else { echo	"/members/images/{$CP['county']}/{$CP['logo']}"; } ?>" width="60" height="60" id="clubinsert" name="clubinsert" >
      
       <input name="club" type="hidden" value="<?php echo $CP['clubID'];?>">
       <input name="pap" type="hidden" value="<?php echo $CP['permission'];?>">
     </form>