Nios Ethernet elf download error

Hi there ,

I am trying to run a simple loopback design using Triple Speed Ethernet on DE2-115 board . following this doc "Using Triple-Speed Ethernet on DE2-115 Boards".

When i try to download and run the Nios app i get this error "Elf download failed" , from the previous threads on this subject i checked that my sys reset is connected to the locked output of PLL , which get high ( logic 1 ) right after .soc download , so no problem there .

Also i have connected set_10_n to en_10 and set_1000 to en_mode_n , because as i have read in Triple-Speed Ethernet Intel® FPGA IP User Guide, Updated for Intel® Quartus® Prime Design Suite: 19.4'IP Version: 19.4.0 .

That : @ page 109 :

set_1000 = Gigabit mode selection. Can be driven to 1 by an external device, for example a
PHY device, to set the MAC function to operate in gigabit. When set to 0, the MAC
is set to operate in 10/100 Mbps. This signal is ignored when the ETH_SPEED bit in
the command_config register is set to 1.

Same for set_10 .

I am using Quartus ver 16.0 . See project attached .

Regards , Ahmed