[flashrom] asus p4p800 error while flashing

[Yura I]

Hi. I got an error while flashing asus p4p800 motherboard on ubuntu 10.04:

$ sudo flashrom -w P4C800-ASUS-Entry-1021.005
flashrom v0.9.1-r946
No coreboot table found.
Found chipset "Intel ICH5/ICH5R", enabling flash write... OK.
This chipset supports the following protocols: Non-SPI.
Calibrating delay loop... OK.
Found chip "SST SST49LF004A/B" (512 KB, FWH) at physical address 0xfff80000.
Flash image seems to be a legacy BIOS. Disabling checks.
Writing flash chip... Erasing flash chip... ERASE FAILED at 0x00000ae8!
Expected=0xff, Read=0x44, failed byte count from 0x00000000-0x00000fff:
0x4fb
ERASE FAILED!
ERASE FAILED at 0x00000ae8! Expected=0xff, Read=0x44, failed byte count
from 0x00000000-0x0000ffff: 0xf419
ERASE FAILED!
FAILED!
ERASE FAILED!
FAILED!
Your flash chip is in an unknown state.
Get help on IRC at irc.freenode.net (channel #flashrom) or
mail flashrom at flashrom.org!
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DO NOT REBOOT OR POWEROFF!

Old bios is saved. Computer isnt rebooted. Can you help me?
Yuri