[AO] First script, modifier key issue

[ShiroiKuma]

Using HotkeyNet, I've got 3 windows open, but when I press key 0 inside my first window, I'd like ctrl+alt+shift+0 to be triggered in my other windows. However this just doesn't appear to trigger.

My key setup is

<HotKey 0><SendLabel w2, w3>
<Wait 200> 
<Key F2>
<Wait 200> 
<Key CTRL ALT SHIFT 0>

And in the output window I am seeing the following

From this pc: <SendWinM AOSlave1><Wait 200><Key F2><Wait 200><Key CTRL ALT SHIFT 0><SendWinM AOSlave2><Wait 200><Key F2><Wait 200><Key CTRL ALT SHIFT 0><SendWinM AOSlave1> completed: Window found. Target set to 0x1A0614 "AOSlave1"
<Wait 200> completed: 200 milliseconds
<Key F2> completed
<Wait 200> completed: 200 milliseconds
<Key CTRL ALT SHIFT 0> completed
<SendWinM AOSlave2> completed: Window found. Target set to 0x1B0638 "AOSlave2"
<Wait 200> completed: 200 milliseconds
<Key F2> completed
<Wait 200> completed: 200 milliseconds
<Key CTRL ALT SHIFT 0> completed

However the windows AOSlave1 and AOSlave2 which have actions bound to ctrl+alt+shift+0 (which work manually inside the windows themselves), don't get called.

Really not sure what the problem is, can anyone help me out please?