LinuxQuestions.org - KPPP can't connect if I'm not root

I've got a strange problem, if I run KPPP by user it seems to connect correctly but I can't do anything cause applications (browsers, xchat, ping..) behave like I'm not connected.
If I run KPPP by root, it connects correctly and I also can use my connection.
This are my kppp/pppd permissions:

Code:

sid:/home/sly# ls -l /usr/bin/kppp && ls -l /usr/sbin/pppd

-rwsrwxrwx    1 root    dip        480728 2003-08-03 03:44 /usr/bin/kppp

-rwsr-xr--    1 root    dip        277624 2003-10-06 20:26 /usr/sbin/pppd

sid:/home/sly#

I also tried to use gkDial but it stops saying "dialing..." both by user and by root, and never really estabilish the connection.

My modem is 56K /dev/ttyS0

Thank you