Generally with HKN, you dont want to send your movement keys to your slaves. You either want a key macro'd that gets sent to the slaves to follow your main toon. Or use the addon Jamba to have the slaves automatically follow the master. The only movement key that I send to all my toons is the Jump key.

Also, for attacking, you need to set up an assist macro so when you hit your attack keys it also sends the key for the assist macro to all slaves. Here is a snippet of my script for reference. I run 5 toons and I can switch between which toon is the lead on the fly, thats why I have the If statements. Which ever window is active it sends the assist key to all the other wows. So if w1 is active it sends the key, ] (OEM4 to HKN), to the other 4 wow's. If w2 active it sends shift+] to the other wows.

<Template Assist>
<SendLabel %2% %3% %4% %5%>
<key %1%>
<EndTemplate>

<Hotkey ScrollLockOn 2-7, a, z, q>
<If ActiveWinIs WoW1>
<ApplyTemplate Assist Oem4 w2, w3, w4, w5>
<SendLabel w1, w2, w3, w4, w5>
<Key %Trigger%>
<Else If ActiveWinIs WoW2>
<ApplyTemplate Assist "shift Oem4" w1, w3, w4, w5>
<SendLabel w1, w2, w3, w4, w5>
<Key %Trigger%>
<Else If ActiveWinIs WoW3>
<ApplyTemplate Assist "ctrl Oem4" w1, w2, w4, w5>
<SendLabel w1, w2, w3, w4, w5>
<Key %Trigger%>
<Else If ActiveWinIs WoW4>
<ApplyTemplate Assist "alt Oem4" w1, w2, w3, w5>
<SendLabel w1, w2, w3, w4, w5>
<Key %Trigger%>
<Else If ActiveWinIs WoW5>
<ApplyTemplate Assist "ctrl alt Oem4" w1, w2, w3, w4>
<SendLabel w1, w2, w3, w4, w5>
<Key %Trigger%>