I have virtual avionics for pmdg 747 and 777. I am using prepar3d V4.4 

I made sure I am on the same network from the Ipad. I am unable to connect at all. I changed the port as mentioned on this forum and updated it in the program 86 but still no luck restarted again no luck. 

I keep getting a message not able to connect VAInterface .dll please restart VAInterface 

Done that 30 times did not work 

Anyone have an idea what to do firewall is allowed the program 

Thank you 

Amr Guindy 

Ask the company that made the iPad software?

I had this problem for the longest time.  First, don't ever install it or any other addon (or P3D itself) in \Program Files or \Program Files x86.  Nothing but issues.  So uninstall and reinstall somewhere else (I created a folder called P3D-Addons\  and haven't had an issue with addons since.  Also, change your network type to Public.  This will help with VA Interface disconnecting constantly.  It eliminated it completely for me.

Thanks a million Andrew I will follow these steps great advise