Pbs speedtouch apres installation--> ERROR...

Bonjour, j'aid suivi un tuto pour installer mon speedtouch 330 sous linux seulement petit probleme :
...
couldn't get channel number : input/output error
pppoa3 : aucun processus tué
disconnect scipt failed
pppoe : option requires an argument -- I
Options:
-I if_name -- Specify interface (default eth0.)
-T timeout -- Specify inactivity timeout in seconds.
-D filename -- Log debugging information in filename.
-V -- Print version and exit.
-A -- Print access concentrator names and exit.
-S name -- Set desired service name.
-C name -- Set desired access concentrator name.
-U -- Use Host-Unique to allow multiple PPPoE sessions.
-s -- Use synchronous PPP encapsulation.
-m MSS -- Clamp incoming and outgoing MSS options.
-p pidfile -- Write process-ID to pidfile.
-e sess:mac -- Skip discovery phase; use existing session.
-n -- Do not open discovery socket.
-k -- Kill a session with PADT (requires -e)
-d -- Perform discovery, print session info and exit.
-f disc:sess -- Set Ethernet frame types (hex).
-h -- Print usage information.

PPPoE Version 3.5, Copyright (C) 2001 Roaring Penguin Software Inc.
PPPoE comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it under the terms
of the GNU General Public License, version 2 or any later version.
http://www.roaringpenguin.com

Voila j'espere que quelqu'un peut m'aider je commence un peu a desesperer la. :)
Merci d'avance.