Another monster esc problem

HI
My monster esc has a problem since yesterday. I can't calibrate it correctly. My motor running slowly forward if my throttle is neutral and when I give full brake the motor stops but never goes backward. I tried to calibrate it but when I launch the esc on full throttle it begans with it's classic flashing three leds and sound like normal powered but after that there's only solid yellow light and the esc's green light never blink for accepring the full throttle end point.Only solid yellow:(
What should I do ?
Note: Esc is not on race mode.