Programming Flash memory failed

Hi,

I am using CycloneIII FPGA, Quartus11.1sp1 & NIOS IDE tool.

I am able to load sof file using quartus tool.

I need to burn sof file using NIOS IDE tool into my flash memory using JTAG.

when i tried to burn flash i am getting below error messages continuously.

erase failed at offset d0000

programming at a0000 failed... the address is not constant every time, it is changing randomly.

I tried more than 30 to 40 times but still error is coming.My data transfer from FPGA to PC is through Ethernet(TCP/IP) protocol. Once the flash is programmed i can ping my FPGA board using Ethernet protocol.

I have given all the setting in NIOS project build.

note: This NIOS IDE project is working for all the FPGA's except few.

We verified all the voltage and current levels of our board ... looking everything is fine.

I am attaching the my NIOS IDE project settings and error msgs.

Any one please help on this.....