[hud only works on the ground]

so, here is what I did for the root:

integer gchannel;
default
{
     state_entry()
    {
     gchannel = 0x80000000 | (integer) ( "0x" + (string) llGetOwner() );
       
    }
    link_message(integer link, integer num, string msg, key id)
    {
        if(msg == "5")
        {
           key id = llDetectedKey(0);
            llRegionSayTo(id, gchannel, "earringblue"); 
        }
        else if(msg == "4")
        {
           key id = llDetectedKey (0);
           llRegionSayTo (id, gchannel, "earringpurple");
        }
         else if(msg == "3")
        {
           key id = llDetectedKey (0);
           llRegionSayTo (id, gchannel, "earringyellow");
        }
         else if(msg == "2")
        {
           key id = llDetectedKey (0);
           llRegionSayTo (id, gchannel, "earringpink");
        }
    }
}

and this is what i did for the child prims

default
{
    state_entry()
    {
        llSetObjectName((string)llGetLinkNumber());
    }
    touch_start(integer num)
    {
        llMessageLinked(LINK_ROOT,(integer)llGetObjectName(),"Clicked","");
    }
}

I actually folllowed a little tutorial but as I said the clicking only works when the hud is on the ground and not when i attach it..

[hud only works on the ground]

Hello!
I am working on a hud at the moment, the only problem is that when I attach it I can't click on it anymore (even though when i put it on the ground and click the buttons there, it still works...)
So my question is now: What have I possibly done wrong in the scripting?