Need help with thing

Hi all.
I'm doing my Rotu1.0 mod for MW2
and last time i have problem with Exploding Barrels
When i placed barrel, and zombie next to barrel - barrel explodes, but if i will place barrel second time, barrel explodes without zombie, like if zom not next to a barrel!
Code:


barrelDeath(owner, item)
{
self endon("exploded_barrel");
//self endon("zombie_died");
//level endon("test");
//self endon("death");
while(1)
{
for( i = 0; i < level.zombies.size; i++ )
{
bot = level.zombies[i];
if(distance(self.origin, bot.body.origin) < 77)
{
PlayFX(level._system_effect["explosion_default"], self.origin);
self PlaySound("explo_metal_rand");
owner radiusDamage( self.origin, 250, 360, 290, owner );
self delete();
self notify("exploded_barrel");
return;
}
}
wait .1;
}
}
Sorry for bad english