I don't have Mandriva installed on any system so I will just tell you some standard things to check. Normally VPI and VCI settings are usually not required in a PC so probably you can do without them. Have you assigned an IP address to the NIC with the same subnet as of the DSL modem's LAN interface ?After you finish the configuration and connect through the GUI, open a terminal and do the following:1. Run ifconfig command and see if a new interface has been created (ppp0)2. If yes, run route command and see what is the default route.Can you post the contents of the relevant file located at the path given below ?/etc/sysconfig/network-scripts/ifcfg-*