Networking :: PCMCIA Xircom CE3B-100

Hello.
I have strange problem with my Xircom CE3B-100.
DSL detects it correctly but after network configuration,network doesn't work. I have no problem with network configuration,interface is UP but I have no connection. Most interested fact is this, that sometimes I have connection, it's strange, because I always do this same steps when I configure my network manually. I haven't DHCP.
Did you ever seen such problem?

Greetings
Mata

original here.