If you turn your transmitter on first, and then your receiver, the lights should come on steady. The only time they should flash is when you're binding (inserting the binding plug etc..) of if you turn the reciever off and on without turning off the transmitter. An example of that would be changing batteries without turing the transmitter off.

If the lights are on solid, and you go flying and come back and they are flashing that means the reciever voltage dropped too low and the reciever reset in flight.