To control LEDs with DE0_Nano

Sory for lack of my knowledge, i will tel what i did

1.Created a empty project in Quartus 11.1, under ubuntu.

2.Generated the system(SOPC builder)like sdram, altpll_sys,cpu,jtag_uart,timer_0, PIO_LED.

3.Created block and symatic diagram(In symatic diagram inputs is clock and reset remaing all those things are outputs)

4Eclipse--->program (previously which i posted in# 7)

Now my problem is iam unable to run the Nios II program it showing error is elf file download failed, but .sof file is i downloaded correctly only, where is the mistake?

Problem with my .sof file? Kindly any help ?

Thanks,

Alex.