network error plaease go to setting and make sure it is type 1, 2, 3

i insert uncharted 3 disc for the first time and to multiplayer mode to play online and it says network error. please help!

i have broadband cable wired through router. connected with 2 other computers.

i went to internet test on the ps3 and it says fail on the "nat type"

please help! how to correct nat type? i can i play all other game sonline fine but not uncharted 3. this is awkward.

edit: weird. i directly connect the ps3 to the modem and it work. use router back and it dont work.