pppoe

[Anto <dekant@inwind.it>]

Ciao Lista!
Sto cercando di configurare l'adsl, ma pppoe mi
da il seguente errore:

Sorry, I scanned 2 interface(s), but the Access
Concentrator of your provider did not respond. Please
check your network and modem cables. Another reason
for the scan failure may also be another running pppoe
process which controls the modem.

#ifconfig
dummy0    Link encap:Ethernet  HWaddr 5E:58:EF:F5:2F:BF
         UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
         RX packets:0 errors:0 dropped:0 overruns:0 frame:0
         TX packets:27 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:0 (0.0 b)  TX bytes:648 (648.0 b)

eth0      Link encap:Ethernet  HWaddr 00:90:F5:1E:6F:15
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:13 errors:0 dropped:0 overruns:0 frame:0
         TX packets:27 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000
         RX bytes:780 (780.0 b)  TX bytes:1620 (1.5 KiB)
         Interrupt:9 Base address:0x6800

lo        Link encap:Local Loopback
         inet addr:127.0.0.1  Mask:255.0.0.0
         UP LOOPBACK RUNNING  MTU:16436  Metric:1
         RX packets:71 errors:0 dropped:0 overruns:0 frame:0
         TX packets:71 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:4492 (4.3 KiB)  TX bytes:4492 (4.3 KiB)

I cavi sono correttamente collegati, i led sul modem sono acceso, il
modulo pppoe è caricato...
Qualche suggerimento?
Grazie.Antonella.