Using SendPlay to send Ctrl+Space to active window

[preachers]

It seems simple to do that, but it doesn't work with my code:

#If WinActive("ahk_class REAPERwnd") or WinActive("ahk_class #32770")

$^space::SendPlay, ^{space}

#If

When I press Ctrl+Space in the specific active window, it still changes the windows IME status.