Inconsistent key sends across windows

Howdy! I'm using the following script via HotKeyNet, and it works inconsistently. I find I have to spam the hotkey to even get the other windows to register, and it fires at like 1/10 key presses.

Code:

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<Hotkey ScrollLockOn Ctrl P>
<SendPC local>
<RenameWin "Dark Age of Camelot © 2001-2017 Electronic Arts Inc. All Rights Reserved." "a1">
<RenameWin "Dark Age of Camelot © 2001-2017 Electronic Arts Inc. All Rights Reserved." "a2">
<RenameWin "Dark Age of Camelot © 2001-2017 Electronic Arts Inc. All Rights Reserved." "a3">




<Label D1 Local SendWinSF "a1">


<Label D2 Local SendWinSF "a2">


<Label D3 Local SendWinSF "a3">


<Hotkey 0-9, v>
    <SendLabel D1, D2, D3>
      <Key %Trigger%>

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Any help would be great, ty!