Sorry for the late reply.
The following link will show you how to add an exception for a program in Windows 7http://www.sevenforums.com/tutorials/542-windows-firewall-add-remove-exception.html
Under step 6, add an exception for Vectir.
Also make sure you have the correct network IP address selected on the WiFi Remote Control dialog in the Vectir PC software. This is found in the right hand setup panel under Hardware > WiFi. If multiple networks are listed in the drop down box and you are not sure which network your phone and PC are connected to, try each IP address one by one ensuring to enter the same IP address in the phone app.
Hope that helps