[Wine] Ragnarok connect issue

[km]

I have ragnarok online (a private server) wich work perfectly when i launch it but at login screen after i put my name and password it says "Failed to connect". I used wireshark and WPE and i saw that the game didn't send any packet to the server. I think the game doesn't have access to the network but i don't know how to fix that. If i look for firefox with wireshark and WPE it shows many packets.

Can someone help me ?