Under IE/Tools/Internet Options/Connections select never dial. This
generally stems from users previously having dialup and moving on.
Other checkpoints:
Right click My Network Places/Properties/Advanced (top toolbar)/Dial-Up
Preferences/Enable Auto-Dial by Location/Uncheck all locations and check off
always ask me before auto dialing. Also, Disable autodial while I am logged
on.
In the Enable Auto-Dial By Location dialog box, select each location for
which you want the automatic dialing feature to operate. Reboot.
Disable or Enable AutoDial (Line 91)
http://www.kellys-korner-xp.com/xp_tweaks.htm
To view the list of names and addresses recorded by AutoDial, type the
following command at a command prompt: rasautou -s
To delete a name or address entry from the list: Start/Run/Regedit
HKEY_CURRENT_USER\Software\Microsoft\RAS Autodial\Addresses