How To: Long Left Click?

[Anthrazite]

I'm quite new to this AutoHotKey stuff and I'm trying to create a macro for a game.
So basically what I'm trying to do is:

By clicking the wheel button, I want it to press the button 2 on my keyboard and then right after that I want it to hold down the left click button on the mouse. But somehow it only does a short left click but not a long one?

This was my attempt:

mbutton::
Loop
{
if not GetKeyState("mbutton","p")
break
Send {2 down}
Sleep 0,003
Send {2 up}
Sleep 0,003
Send {Click, down}
Sleep 0,005
Send {Click, up}
Sleep 0,001
}
return

[ceyhunveysel]

Sleep is meant for milliseconds.