Forums Developers $idle issue

Hi all.
I dunno why in mirc 6.16 if i type in a window:

/timertest 3 1 echo -a My idle is: $idle


I get correctly:

My idle is: 1
My idle is: 2
My idle is: 3


but if I make an alias

/time {
/timertest 3 1 echo -a My idle is: $idle
}


and call it i get always


My idle is: 0
My idle is: 0
My idle is: 0