weird behaviour with link message

Hi guys, i'm trying to do door open/close with link message and for some reason it keeps on doing it twice, i don't know why this is happening, it never happened before

THis is what i have for the pressing prim
touch (integer num) {
llMessageLinked(LINK_SET, 0, "", "";
}

in the opening prim

link_message(integer link, integer num, string str, key id) {
//open/close door
}

its doing both the open and close, but SOMETIMES it only does open or close, for some reason its doing the link_message twice but i've only pressed once

can anyone point out what i did wrong? much appreciated. thanks
Mobius

I believe the issue is you're calling the open/close message with the touch event. it's my understand that this message will keep on being broadcast as long as someone is touching the object. what you want is the 'touch_start' event- this will be broadcast only when someone begins to touch an object.

touch_start (integer num)
{
llMessageLinked(LINK_SET, 0, "", "");
}

in the opening prim

link_message(integer link, integer num, string str, key id)
{
//open/close door
}

P.S, using PHP tags on the forums makes code much easier to read

Thanks! it works, and i will use PHP next time.