Thanks Alex. Maybe i should have put my glasses on before getting confused...there is even an arrow printed on the board!! I changed the the yaw to 90 degrees as i like to have the usb at the rear of the quad and all is now fine. By the way i used a nice piece of software to flash the board. It enables you to enter bootloader mode without messing around with Zadig or shorting jumpers,really handy if you need to flash a craft without taking it apart. It's called Impulserc driver fixer,give it a try,it worked on every FC that i've tested it on.
Anyway Thanks again and safe flying to all.