Hello, here is an update on my problem. First off, the plane that was taking off from Hilo and disappeared was disappearing after 20NM not 10. I changed it to fly IFR but the result were the same. I removed all of the addon airports, textures, and flight plans just to try to get back to the basics. I had the same results. (No, I haven't see any planes land at PHKO). I took Bobs advice and flew out of these airports myself. I did notice one odd behaviour. Flying out of PHKO (IFR) I was able to get my clearance and get permission to take off but after I lifted off, the tower never transfered me. They did ask me to confirm the transfer but never gave transfer instructions. I confirmed the transfer and there were no options in the ATC window, all it said was "no messages to transmit to anyone". My IFR flight was from PHKO to PHTO so I continued the flight, when I was 23 NM from PHTO the ATC window gave to the option to tune Hilo approach. Everything after that moment, to landing, to parking went well.
I reversed the flight plan (PHTO to PHKO) and ATC work normal.
On my last flight plan, I set it up IFR from HI13 to PHKO, on the ground at HI13 ATC showed no options (just said "no messages to transmit to anyone") I took off anyway and turned toward PHKO and after a few NM the ATC let me tune to the tower, it gave me the VFR options (Land full stop, touch and go, transision airspace,I think these are the options) I had purchased Radar Control (RC) a while ago so I was thinking that maybe this was causing the problem. I uninstalled it but the problem remains.
I'm concidering reinstalling FSX and Acceleration and just start fresh. Any ideas???