I don't know why non of them works?!

I tried whatever you mentioned even before I ask it here.

I mean when I c_scan and ignored the passable or flag2 or ignored the you entity this code still runs:
c_scan(my.x,my.pan,vector(180,0,1000),ignore_me|ignore_passable);
if (you==weapon)
{
exit;
}

But it shouldn't run.