i got the gws pico tigermoth. i got a 6 channel naro type that has letter F on it, the previous reciever was 4 channel naro type with a J on it, why is the 6 channel not working??

barelias,

It sounds as though you are using the wrong transmitter for your reciever. I'll explain. On 72 Mhz Futaba and Hitec; JR and Airtronics use different sides of the 72 Mhz(I can't think of any other way to explain it) These are called shifts.

Now, GWS recievers are marketed on different shifts and the ''F'' stands for Futaba and the ''J'' for JR. So I would say that you have the reciever on the wrong shift. Take it back to where you bought it and see if you can swap it.
Hope this helps
Zimbo