I am trying to access some information from mysql, but am getting the warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result resource for the second line of code below, any help would be much appreciated.

$musicfiles=getmusicfiles($records['m_id']);
$mus=mysql_fetch_assoc($musicfiles);
for($j=0;$j<2;$j++)
{
 if(file_exists($mus['musicpath']))
 {
  echo '<a href="'.$mus['musicpath'].'">'.$mus['musicname'].'</a>'; 	  
 }
 else
 {
  echo 'Hello world';     
 }
}

function getmusicfiles($m_id)
{
$music="select * from music WHERE itemid=".$s_id;
$result=getQuery($music,$l);
return $result;
}