Windows XP blue screen error with ACPI enabled!

[job s]

Hi,
I am a BIOS developer, I get a blue screen error "STOP  0x0000007e
(0Xc0000005,0xf748e0bf,0xf78da208,0xf78d9f08) pci.sys -address F748e0bf base
at F7487000 , datestamp 3b7d855c. " when i try to install windows XP in the
targer motherboard.
Please help in decoding the error message.

thanks in advance.

velavan