charge your battery once more. keep it plugged in until you are sure that the phone is fully charged. then try once more.
and about far manager, while flashing the fs(K750_R1CA021_FS_EUROPE_2_RED36), you should unbrand the phone, ie, you should copy the respective custom pack into your phone's fs. (tpa/preset/custom). i presume you did not copy the custom pack. that is the reason for the "configuration error". all the best