Strange MouseClick problem

So last night I wrote a script to find and image and click on, it work perfectly all night while testing. When I woke up this morning it not longer worked for some reason and I have no idea what couldn't changed. The script still finds the image, and right after I post a msgbox to make sure it hits that line of code and returns x,y, but the mouse click never fires

It does however fire once if I click back to Scite? But only once since the window is not longer active, it's almost as if there is a setting in Scite that needs focus? Or maybe the window is all of a sudden blocking automated mouse clicks somehow?

Any ideas?

#include <ImageSearch.au3>
Opt("MouseCoordMode", 1)

$WinName = "TestWindow"
$ImageLoc = "z:\dev\Images\TestImage.png"

HotKeySet("{F2}", "ClickImage")
HotKeySet("x", "Stop") 

$X= 0
$Y= 0

Main()

Func Main()
   while 1
      sleep(10)
      IF WinActive($WinName) Then
         ClickImage()
      EndIf
   wend
EndFunc

Func ClickImage()

  $result = _ImageSearch($ImageLoc ,1,$X,$Y,5)
   IF $result=1 Then
      MsgBox(0, "", "Found Image at" & $X& ":"& $Y)
      MouseMove($X, $Y)
      MouseClick("left")
   EndIf
   Sleep(100)
EndFunc


Func Stop() ;to allow the script to stop
    Exit
EndFunc