viper 5902 remote start prob

Hello, I just installed a viper 5902 in my 2006 ford expedition. Everything works good except for when the vehicle is running. If I use the key and start it I can't use the pit stop feature. Remote flashes "out of range". Also if I remote start the vehicle, after it runs for a few minutes the remote flashes the same message and wont disarm or shut down etc... Vehicle ran for the set time, shut down and was able to disarm. Only have problems when truck is running for awhile it seems. I am able to remote start and stop the vehicle if I do it within a few seconds Any ideas?

Have you programmed the turbo mode on?

Nope, just double checked. I did notice that whether I remote start or use the key, after about 15-20 secs I hear a relay click in the module and thats when the unit becomes unresponsive.