Mega Multi-Expansion shield with Ethernet shield: connection problem

Hi guys,

I use a shield 2560 board with :

When I play with the sketch "WebServer" with my Ethernet shield and my 2560, there is no problem, I can ping my Ethernet shield board from my computer. But when I use the complete assembly (with Mega Multi-Expansion shield) I can't ping my Ethernet shield.

I didn't find any help on internet :frowning:

Could you help me please ?

Thank you very much guys !