CSS 326 (v,2,10 ) PING - yeS, web iface - no

When I try to connect non full-duplex device css326 goes in unknown condition, I can ping it, but cant get in web interface. Any suggestions?
fault.jpg

Why the connection with your PC is not full duplex ?

Conection with my pc is gull duplex 1gb, because i see another css326 and they works good, i have 9 css326. I guess, printer is lagging and goes in half duplex. Collision took place. Today i downgraded to 2.8, and everything became Ok. Hope its solution.