ADSL + SUSE 8.1

Hello I've got following problem. I wanted to install ADSL (t-online austria) using the YAST2 DSL module. When I start the communication I get as a last message: Sending PADI. Waiting for PADO. Plese check your configuration. I tried to find some docu about it, but I found only suggestions to install pptp and use it for this purpose. When I wanted to install it complained about the ppp version in suse. Could you please tell me how I can solve the problem or where to find an information how to solve it. Thank you very much Ivo