FSUIPC problem just with 777

Hey guys, here's the thing. I'm having a FSUIPC problem just when a fly with pmdg 777 on FSX. The problem starts after 2 hours of flight, then suddenly the screen keep frozzing for 8 seconds after 3 seconds working. The only way a found for this issue is to restart the simulator, but is temporary, 'cause after 1 hour starts again, and I have to do the same process over and over again.

So, about the FSUIPC, I notice on 'Addons' that when I'm having this problem, FSUIPC it's not open. Sometimes when a I close another addon like 'OPUS' or 'VAFS' or 'APController', FSUIPC goes back to addons list, after this it's working again, but just for a 2 minutes top. And then a have to restart FSX.

pmdg 777 last version

FSUIPC last version

Thanks.

FONGARO, Andrei.