Click healing from Tank Window using an Addon

[holden]

<Hotkey LButton>
 	<If MouseIsOverWindowRect WoW1 900 600 40 40>  //This means its on window WoW1 (which is my tank) over the first grid entry (which is CharA)
           	<Sendlabel healer>
                 	<Key rctrl o>
 	<Else If MouseIsOverWindowRect WoW1 940 600 40 40>  //This means its on window WoW1 (which is my tank) over the second grid entry (which is CharB)
            	<Sendlabel healer>
                  	<Key ralt o>
 	<Else If MouseIsOverWindowRect WoW1 980 600 40 40>  //This means its on window WoW1 (which is my tank) over the third grid entry (which is CharC)
            	<Sendlabel healer>
                  	<Key rshift o>
 	<Else If MouseIsOverWindowRect WoW1 1020 600 40 40>  //This means its on window WoW1 (which is my tank) over the fourth grid entry (which is CharD)
            	<Sendlabel healer>
                  	<Key lshift o>
 	<Else If MouseIsOverWindowRect WoW1 1060 600 40 40>  //This means its on window WoW1 (which is my tank) over the fifth grid entry (which is CharE)
            	<Sendlabel healer>
                  	<Key lalt o>
 	<Else>   //To pass the mouseclick, if no region was hit
         	<SendFocusWin>
                	<ClickMouse>

ive just set this up and am trying it out, it works fine but one problem i have is that while i can still click other areas on my main screen, clicking the left button and dragging the mouse has no effect (ie moving my camera angle, using scrollbars etc). is there a way to fix that? ill just be using button4 instead of lbutton if not.