You can try to relflash the phone with XS++. Tutorial: XS++ 3.1 Guide-Flashing, Customizing. Or with SETool2 Lite(check out the first post of this thread)But I think that the GDFS is corrupted. What have you done with the phone? Do you have a GDFS backup? If yes then restore it, but DO NOT flash another GDFS even if it is came from a K750 phone.

By the way, I cannot send you any PM(the system says that you disabled this feature, or your inbox is full).