Try to make a EROM-Update with KulanKendi Client for free, but be aware NOT to upgrade to CID53. Just flash CID52 EROM.
If that does not help you can try to flash GDFS-backup if you got one from the time when the phone was working.
If not bad luck, looks like GDFS is damaged or security zone and only an Ultimate Unlocker credit can help you or hardware like SETool or Cruiser.