Step 1) Run macro pro as administrator
Click on " On "
Open up A.V.A
Go to options
Click the "Keyboard" tab
Go down to your fire key which should be set, by default, as left click. CHANGE THIS TO MIDDLE MOUSE BUTTON or SOMETHING THAT YOU DON'T USUALLY CLICK
Step 3) In-Game click F4 when you are ready to use the macro, and just left click to shoot and everything will be working correctly.