hello everyone 
i purchased crius multiwii se v2.0 from quadkopters few days ago...
i uploaded 2.2 firmware and compile the code and its shows done compiling
when i upload the code  and its shows avrdude: stk500_getsync(): not in sync:resp=0x00 and also shows "done uploading"
and when i start GUI i saw all sensors are working properly ,all rx channels (roll,pitch,yaw and throttl) are working properly and shows its value nearly about 1500 and min throttl value was 1150
now problem is that my board is not arming....
what should i do??
thnx

and when i connect battery both LEDS red and green are on...
anyone know how to arm it please help me.im using a RCB7x tx rx...

Did you follow the arming instruction,
Throttle low -> then Yaw right

Yaa but nothing happen

In Multiwii GUI to what extent does the throttle channel goes low??
Try increasing the endpoint of the Yaw channel...

Sir can you explain how to increase endpoint of yaw channel 

Thnx santhosh sir i increase the end point of yaw channel now its working properly