Hi,
My subscription is an ADSL GO PLUS.
My IP is dynamic.
I use PPPOE to make the connection.
My parameters are : 
Dynamic IP Address
Connection on Demand enable
Idle Time Out =0
MTU : 1492
When i check the log : i see this
Apr/01/2002 09:02:07  PPPoE: opening connection ... 192.168.123.110:1047 168.95.192.1:53  -> i opened IE 
Apr/01/2002 09:02:04  PPPoE Retry Fail   Disconnect PPPoE line 
Apr/01/2002 09:01:47  Manual Dialup   Try to establish PPPoE line  -> I started my router
I called Skynet for tracing my connection but they will not 

I asked them the error message, but they explained me that it's impossible for them to see the error message and why my connection is refused....I'm not sure of this...
USR is looking to make a new firmeware where the option "CLONE MAC ADDRESS" is added to the PPPOE connection...they think that the problem is there...