Need help : implement Gigabit Ethernet

ty for your response daixi

i recapitulate :

1) i launch Nios II IDE 9.1

2) with the tab run, i programm the FPGA with the .sof from the devkit 9.0.2

3) i create my project using the SSS as the tutorials frome the kit tells me

4) i build the project with success

5) i do Run As > Nios II Hardware

and the i get the message as my previous message

i checked in SOPC Builder and 0xC000000 correspond with the base address of altmemddr_bridge : an "Avalon-MM Clocking Cross Bridge" as the attached picture show you