I'm building tricopter Using kk v5.5 board. When I connect aileron, Elevator, throttle, rudder to the receiver and to the board makes twice beep sound and the transmitter doesn't work. But if I connect only Aileen,elevator, throttle then it works fine. I flashed kk board with tricopter kapteinkuk v1.6, is there any problem with the rudder pins so guys pls help me.

Not very informative...
Just try minsoo kin firmware
These are better than those. .
Transmitter doesn't work?
Makes twice beep sound? What makes the sound?
Try being more specific

Thanks for ur reply, the led light doesn't on only two beep sound comes On the kk board. One of my friend told me that I need to adjust the throttle, I'm using avionic RCB 6i tx and rx so pls tell me how to do that.

What are your pots?  Make a video and post the link over here if possible

It's working fine now, but new problem is my tricopter is not flying even in full throttle, it's weight about 700grams and using avionic pro m2230 2250KV motors, and 8×4 size propellers. So I have to reduce the weight?? pls help me.

Dude why are you using high KV motors? Is it a mini tricopter? I guess your motor selection is wrong.

what to do now

Get some low kv motors. What ESC are you using?

20Amp, 3cell 11 volts battery

ESCs are good. Just get some low kv motors like the sunnysky 980 kv or emax 935kv motors.

If I reduce the size will it fly?

Yes but you will have to reduce a lot...
I wonder why your motors don't get heated up by using those prop...

Then what size should I use. 

The motors you currently have is for mini quads.
Better you get motors with at least 1 kg thrust.

Thank a lot