Erase Flash EPCS16 Bemicro

Hello,

I have a problem to reset the ECPS Flash on Bemicro.

I programmed the Bemicro's flash (ECPS16N) with Nios II Flash programmer. Once the flash is programmed, the orange les is always on.

Now I need to erase the flash.

I tried to reprogram the BeMicro with a new code through Quartus and I get the following message:

"Error : Can't access JTAG chain

Error: Operation failed"

Even the overwriting the flash by a new code, with the Nios II Flash programmer does not help. When I download the .SOPCINFO file, the folowing message appears:

"No Nios II target connection paths were located. Check connections ant that a Nios II.sof is downloaded"

Please help.

PS : I use Quartus II 9.1sp2 and Nios II