I had a similar problem when I first connected. Issue was my wireless router was 11 years old! So rather than try to tweak it, I bit the bullet and bought a brand new router for about $50 bucks. The key secret from my new wireless router was to FIRST make all connections hard connected -- then connected the computer wirelessly. All is well. I still have a small issue with incoming calls that is being looked at -- but this is not as issue with the network setup. VIOPo support is aware of my issue and is working on it.

Ken