cant determine ip on dhcp, means no network

Fri Apr 21 07:43:27 UTC 2006

I have a zoom adsl x4 5001 modem and a cnet pro200 ethernet card which seems to work in fc5. but i cant get the network online. static ip doesnt work either. i always get the same result which is: I try to activate the ethernet(DHCP), it fails to determine the IP
information for eth0.
my service provider use pppoe llc protocol and i have a dynamic ip. 
in fc4 i dont have any network problem since the installation but in fc5 i dont have a network which means i become a blind guy try to use a new distribution.
any ideas, how can i get my internet back!???

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