Booting the PPC440 in virtex 5 processor from strata flash in ML507 development board

Hi Guys,

I'm using ML507 development board which has virtex 5 FPGA and PPC440 
hard block,

In which PPC440 has the peripherals
1) DDR2
2) Flash Controller
3) Internal BRAM
4) Uart controller

we are trying to store the u-boot code in the strata flash , and we are 
mapped the reset vector of PPC440 to strata flash. but the PPC440 is not 
at all booting up.

in the chip scope pro we could tap the signal connected to flash memory, 
in which after FPGA is getting configured the PPC440 is driving the 
chipselect of strata flash and trying to read the u-boot data from flash 
memory , but the address it is jumping is not the reset vector (i.e 
reset vector addr for PPC440 is 0xFFFFFFC).

how to fix this.... issue
anyone who worked on this may be guide us in right way

thanks in advance.