problem with bluetooth serial

hi i'm using repetier dev version.
and added this to configuration.h

#define BLUETOOTH_SERIAL 1

#undef ENDSTOP_ZMAX_PIN //clear zmax pin for serial
#define ENDSTOP_ZMAX_PIN ENDSTOP_YMAX_PIN


repetier.h
#define NEW_COMMUNICATION 1


but serial 1 not working
i have some idea but can't find problem
pin config or firmware?
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