Can't calibrate!

WriteInstinct locks up after MPU calibration. No response after to "c" command.

Have latest Arduino IDE, NyBoard support, updated libraries, edited Instinct.h to NyBoard_V0-2

Serial Monitor 57,600 baud, No Line Ending

All servos connected, battery switched on

Install WriteInstinct and open serial monitor,

Reset Joint calibration (Y)

Update Instincts (n) I get single lines 1-42 and Finished!

Calibrate MPU (Y) Finished! Offsets saved automatically

type "c" beep and no further response in serial monitor

If I close and reopen serial monitor entire process starts over again with same results.

Any suggestions and thanks.

George S.