Had the same problem. I did the portforwarding (port 13 TCP) in my router and everything went oke. Then I removed everything from FSLabs, which copprupts my P3D big time, and everything was really solved.
I just bought SimpleCam (last version). Am I right that this program doesn't work with P3Dv4.3? Pressing any key doesn't move anything in my cockpit...
KR
Turambar