samsung sgh-i747m flashing error

1. Choose correct flash file(s).
2. If you have PIT file chosen, then you must check ‘Repartition’ option.
3. Check flashing options if needed (Repartition, EFS clear, Boot update).
4. Power on phone in download mode (turn off phone, press vol.down + home + power).
5. Connect phone to PC with USB cable, install drivers if needed.
6. Press ‘Flash’ button.

Operation: Flash
Selected model: SGH-I747M
Software version: 24.1

File analysis… OK
Total file size: 0x43AA4A94 (1082 Mb)
Searching USB Flash Interface… detected COM5
Setup connection… OK
Reading PIT from phone… OK
Sending sbl2.mbn… error
Done with Samsung Tool PRO v.24.1