Well, there's no intensive communication, I'm just waiting for a small chain (60 car) here's my packet :
( 1002A001002FD001C7C0008C70DFC4400604C038DAE080045000029007900001E111A49C0A80066C0A8004C2B0D2B0C001559D4000A00202020202020313938343434343434 )

And I'm just receiving a 13 long chain like : ?orm1.scx... or ascii character that's no match with anything.

CommView is intercept well, but perhaps it works under TCP, because the sample you send me just working fine, but when I change port 11020 and 11021 and put the IP adress 192.168.0.68, it going wrong with a 13 long chain like I described it before.

To test my network, I'm going with your example between two PC. Elsewhere I don't know how to do.

Roman