Avast premier blocks my simserver

I have a program that lets me use my tablet to run my FMC for my flightsim X game. For some reason when I start the simserve, Avast blocks it. I’ve have excluded the file from Avast and have given access in/out through the firewall. But it still blocks it. If I turn off Avast while using my fsx it works fine, and I think if I turn off behavior shield, it will work also. Why can’t I get Avast to not block this file?