Script worked on win 7 but not working on win 8

Hi everyone,
I wrote a simple script that worked on win 7 but the same script doesn't work on win 8.

I used "ShellExcute to" run an "exe" file which works fine!
Later when i want to send {ENTER} to a window the window doesn't response to it.



While(WinActive("[CLASS:#32770]") = 0)
WinActivate("[CLASS:#32770]")
WEnd
Send("{enter}")

I Tried other commands that didn't work and i read in the forum about it but i didn't see any solution to my problem.

I turned off the the UAC !

any advice?