I think problem is that you have only that code in script, im i right ?
your script must be like this to send keys, other way wont work because loop is in the function and when you press F1 it call that function to spam keys and do that all time untill F1 is pressed again.
You can add me on xfire or skype i can show you over TeamViewer if you want its will be much simpler and faster
Code:
#RequireAdmin
HotKeySet('{F1}', '_start')
HotKeySet('{F3}', '_quit')
Global $run
While 1
Sleep(100)
WEnd
; start / pause script
Func _start()
$run = Not $run
While True
If $run Then
Send("{q}")
Sleep(200)
Send("{w}")
Sleep(200)
Send("{e}")
Sleep(200)
EndIf
WEnd
EndFunc
; exits script
Func _quit()
Exit
EndFunc