I think SuSE includes a start/stop utility for PPPoE, see if you have something like this and see what happens when you start it -- you should, when everything is working, have a ppp0 interface up and running. If you go to the command line and type "/sbin/ifconfig ppp0", you should see something printed back.
**Edit**
I just booted up my SuSE box and had a look -- are you using the "DSL" configuration utility under Yast2/Networking? I would think you want to have it set to PPP over Ethernet (PPPoE), that's what all DSL's I've seen use except in the case of a standard TCP setup.
If you don't have it set to connect on demand or at boot time, then you'll need to run KInternet from the K menu (assuming you are running KDE) to get online.
Hope that helps!