at_target bug?

i cant seam to make this work the prim falls and once something touches it, it moves back to the possition it was at but it dosnt seam to get passed the at_target unless i did something dumb again. any ideas?

vector pos;
default
{
    state_entry()
    {
        pos = llGetPos();
        llSetBuoyancy(.975);
        llSetStatus(STATUS_PHYSICS,TRUE);
    }
    collision(integer touche)
    {
        llMoveToTarget(pos, 1);
    }
    at_target(integer tnum, vector targetpos, vector ourpos)
    {
        llWhisper(0,"at target");
        llStopMoveToTarget();
    }
}

I don't think you've defined a llTarget yet.

http://rpgstats.com/wiki/index.php?title=LlTarget

that might do it hehe