help me my Z800 is dead

Hi anybody, my Z800 is dead after flash, I was trayed to recovered but this is the error log with sony ericsson tool and davinci tool:
this is davinci error
Client Version 13.8
Shortly press Power button!
Detected SonyEricsson: Z1010/V800/Z800/K600/V600.
Execution Time - 00.00.14
Baudrate reswitching failed!

thi si free setoll:
GUI v0.91373/UNI
standalone version engaged.
Card serial:00001283
Loaded 49 flash descriptors
RECOVERY MODE STARTED
Open COM port OK
err: 9F
Open COM port OK
err: DF
Open COM port OK
err: E3
Open COM port OK
Elapsed:25 secs.

and this errors if I tray to flash
GUI v0.91373/UNI
standalone version engaged.
Card serial:00001283
Loaded 49 flash descriptors
Open COM port OK
ChipID:7100,EMP protocol:0301
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:36
Speed:115200
err: DF
failed to load CERTLOADERS,try to use RECOVERY.
Elapsed:1 secs.

please somebady help me