Default [Q] external sd undetected on cm 10.2 jb 4.3.1 lg l7

i've updated my lg l7 p705 to rom 4.3.1 beta unofficial cyanogenmod 10.2 build by crept, but my external sd wasnot detected
i've searched using rom toolbox, oi manager, file manager but it was nothing. anyone can solve this problem?
my gallery & camera force close