I have a problem with protokol TCP/IP. When I connect my notebok(IBM Thinkpad 365E) to a LAN network via PCMCIA card(3COM Etherlink III-3c589d) it seem that TCP/IP protocol don't work. I see network neigbourhood but can't connect to internet via PCMCIA card through proxy server. I have desktop computer conected through proxy and it works just fine. I tried ping in msdos-prompt but it won't work. Thank you for help.