Flashing with Y cable+gold card

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http://forum.xda-developers.com – Hello. Please help me to flash the ROM and downgrade SPL. I'm trying do it with Y cable and gold card tools but no succses. When I make a gold card with micro SD card and card reader the phone dont start updating, but when I try to do it with USB key, Im getting this message loading and later "Not allow". Please help me to unlock this device. My phone: OS version: 7.10.8107.79 Firmware revision number: 2250.21.51201.164 Hardware revision number: 0003 Radio software version Radio hardware version: A.102.0.D4 Bootloader version: 5.12.2250.1(134400) Chip (HowTos)