linden scripting :P

//need help with this script, basically what it is for is a shield, but i want it to if owner walks into it then dont play sound
but if not owner then play sound

default
{
        collision(integer num_detected)
        {
         if (llDetectedType(0) & AGENT)
        {
         llOwnerSay(llDetectedName(0) + " is Trying to Enter Shield!");
         llPlaySound("14499709-191f-14cb-e769-aaab9999ae25",1.0);
         llSleep(1.0);
         llResetScript();
        }
    }

}