Problem in loading in zImage to Altera Cyclone - III board

Hi Friends,

While loading zImage file in Altera Cyclone-III board I am facing the following problem. Can anybody help me how to solve the problem.

# nios2-download -g zImage

using cable "USB-Blaster [USB-0]", device 1, instance 0*00

Pausing target processor: OK

Initialising CPU cache (if present)

OK

Downloaded 784kb in 12.9s(57.9KB/s)

Verifying 02500000(0%)

verify failed between address 0x2500000 and 0x2502A15

Leaving target processor paused

Please guide me where I am wrong &How to solve the above issue.

Purushotham

Bangalore.