WVDial works but no connection in Fedora17 desktop

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http://forums.fedoraforum.org – I want to connect to the internet via a dialup modem which is a US Robotics v92 USB modem which worked with F15, and works with Windows. The computer is a new ASUS desktop CM6870 with i7-3770 @ 3.40 GHz 64 bit system. I think wvdial is working but Firefox, Kmail, and Thunderbird fail to connect to server, or report no host. I am not computer literate, but here is what I did. Using wvdialconf, then system-config-network, and finally Vim to remove duplicate lines, wvdial.conf reads: [root@localhost gen]# cat /etc/wvdial.conf [Dialer Defaults] Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLAS (HowTos)