You need to troubleshoot this at a more fundamental level. The first thing to find out is if you have a connection to your ADSL modem. I'm assuming you have things configured so that the modem provides your PC with an address.
Go to the Start menu, select Run and, in the box that appears, type cmd followed by Enter. You should see a command prompt window.
At the prompt, type ipconfig followed by Enter.
If you get successful results (Reply from <address>: bytes = etc etc) then you have a proper connection with the modem.
The next thing is to see if IE can open the modem's configuration page.
Open IE, ignore its messages. In the address bar type
http://192.168.a.b where, as before, the a and b are for your modem.
If you successfully get a page then you have a valid web connection. The problem then becomes working out why IE is configuring itself to get beyond the modem.
Note, if you have a valid address but the ping fails, it may be that your PC's firewall is blocking everything when in safe mode.