connect it with xs, click the fsx, wait for some time, after sx loads all the fs, navigate it to the "ifs/settings/camera/" delete camdriver1.dat and replace a new camdriver1.dat by clicking the upload and select the extracted camdirver1.dat, click the shutdown button and when ask to unplug, unplug the cable. reinsert the battery and startup your phone.
heres a camdriver1.dat uploaded
have a nice day