The receiver is not binding to the transmitter. Make sure the batteries are in good shape in transmitter. I'm assuming it's a 2.4GHz radio frequency.
When you are about to fly, turn transmitter on first after 4-5 seconds turn
heli on or plug battery in on heli. In the manual there should be a page describing radio binding. It will describe on what gimbles to move and
in certain sequences to complete the process. When the light on transmitter stops flashing means the binding process is complete.
Hope this helps.

Hi my volitation has not iam very sad I check all but its not use