Error:Connected system timestamp not found on target at expected base address.

Hi,

I'm fairly new to FPGA programming, please bear with me.

I tried to use Nios II and Quartus II 10.1 on Windows 7(64 bit) to programme a Altera DE2-70 board.

I basically followed these procedures:

1) Generate the SOPC which includes the Jtag Uart

2) add all files into the quartus II project and compile

3) Programme the board

4) Create a project including the application and bsp

5) Build the project

6) Run the project as Nios II hardware

Then it gives me the error:connected system id hash not found on target at expected base address

I tried to follow the posts from the forum and ignored the mismatch in Systemid and System timestamp. Then it gives me: downloading elf process failed.

If I click System ID Properties I get:

Expected system ID base address: 0x0 (as in SOPC)

Expected system ID:0x0

connected system id: not found

Expected system timestamp:1343399230 (as in SOPC)

connected system timestamp: not found

May I know what are the possible issues?

Any suggestions would be much appreciated .