[grbl Issue#1610] homing issue

Need help
Ive my homemade cnc mill. Some six month back checked homing cycle and it was working gold..but meanwhile pc needed HD swap n lost every track of it..now with A grrblupload (saved in sketch folder) only Z gets homed, and with B grblupload only XY gets homed the GRBL settings rwmains the same in both cases.. couldnt find possible reason..i am a layman n doesnt know prgramming etc. Pls help..thanks in advance..