kde network problem

[Nikos Zarkadas <nzarko@trk.forthnet.gr>]

Hello all

I have an adsl connection and i can serf to the internet from all other
browsers like firefox,mozilla,
epiphany, galeon except konqueror. Anything i write in address bar it
always give me "unknown host".
I also can get mail from thunderbird but no from kmail. I can't download
anything with KGet but I can with
d4x.
The strange with this situation is that the first time I configure the
adsl router I did it with konqueror, and a few days later
appear this problem .
Do I have to edit some configuration files?
I use etch , kde-3.4.2

Thanks,

Nick.