Does llGetSunDirection() work?

This code doesn't point my prim (a cone) at the sun, and I think it should. What's wrong with it? I stumped the on-line support person.

point2Sun()
{
    vector sun = llGetSunDirection();
    llLookAt(sun, 1.0, 1.0);
    llSetTimerEvent(10.0);
}

default
{
    state_entry()
    {
        point2Sun();
    }
    
    timer()
    {
        point2Sun();
    }
    
    touch_start(integer num_detected)
    {
        llSay(0, "I point at the sun.");
    }
}

The vector parameter of llLookAt() is in region coordinates while the vector returned by llGetSunDirection() is a unit vector. You need to add your position in region coordinates to the vector returned by llGetSunDirection():

point2Sun()
{
    vector sun = llGetSunDirection();
    llLookAt(sun + llGetPos(), 1.0, 1.0);
    llSetTimerEvent(10.0);
}

And I think that you only need to put the llSetTimerEvent() in state_entry().