modem up and running but no ping

[Martin Wegmann <mailinglist.wegmann@web.de>]

Hello, 

last time I have been away from the uni-network I wanted to use my modem 
(ms-modem). The modem worked but I can't get into the web (KPPP worked fine 
and told me as well that I am conected but ping -c 2 www.yahoo.com prompts 
that it is unknown)

do I have to change something elsewhere like netcardconfig?

thanks in advance cheers Martin