I just bought this darn script in SL for L$150 and darn thing is not working on the doors? something about bring in SL scripts I don't know about. I'm sure it's something every simple , but hey works in SL and not here.
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(Door Remote)

integer chan;
integer ready = TRUE;

default
{
on_rez(integer i)
{
llOwnerSay("Set object description to remote channel number.");
llResetScript();
}
state_entry()
{
llVolumeDetect(TRUE);
chan = (integer)llGetObjectDesc();
llListen((integer)llGetObjectDesc(),"",NULL_KEY,"");
}
listen(integer channel, string name, key id, string txt)
{
if(txt == "DOOR_READY")
{
llSetTimerEvent(0);
ready = TRUE;
}
}
timer()
{
llSetTimerEvent(0);
ready = TRUE;
}
collision_start(integer i)
{
if(chan != (integer)llGetObjectDesc())
llResetScript();
if((integer)llGetObjectDesc() == 0)
return;
if(!ready)
return;
llSay((integer)llGetObjectDesc(),"DOOR_OPEN|" + (string)llDetectedKey(0));
ready = FALSE;
llSetTimerEvent(30);
}
touch_start(integer i)
{
if(chan != (integer)llGetObjectDesc())
llResetScript();
if((integer)llGetObjectDesc() == 0)
return;
if(!ready)
return;
llSay((integer)llGetObjectDesc(),"DOOR_OPEN|" + (string)llDetectedKey(0));
ready = FALSE;
llSetTimerEvent(30);
}
}

The script you have posted looks like its only half the story. When an avatar steps into/or clicks this prim the script is saying "DOOR_OPEN|key of avatar" on a chat channel defined in the prims objects description. I would think this is a sense prim and is probably meant to be rezzed near the door to be controlled. You would need a corresponding script in the door itself that would be listening for the "DOOR_OPEN|key of avatar" command.