[Pluto-help] script di connessione a internetA

[mmurd]

Salve a tutti.

Vorrei collegarmi a internet utilizzando uno script, ma la procedura di
autentificazione fallisce sempre; in /var/log/message compaiono i seguenti
messaggi: 

Mar 17 11:01:56 kenny chat[691]:  -- got it 
Mar 17 11:01:56 kenny chat[691]: send (ATDT0517790000^M)
Mar 17 11:01:56 kenny pppd[689]: Serial connection established.
Mar 17 11:01:56 kenny pppd[689]: Using interface ppp0
Mar 17 11:01:56 kenny pppd[689]: Connect: ppp0 <--> /dev/modem
Mar 17 11:02:27 kenny pppd[689]: LCP: timeout sending Config-Requests 
Mar 17 11:02:27 kenny pppd[689]: Connection terminated.
Mar 17 11:02:27 kenny pppd[689]: Receive serial link is not 8-bit clean:
Mar 17 11:02:27 kenny pppd[689]: Problem: all had bit 7 set to 0
Mar 17 11:02:28 kenny pppd[689]: Exit.


Questo è lo script /etc/ppp/ppp-on

#!/bin/sh
#
TELEPHONE=0517160000	# The telephone number for the connection
LOCAL_IP=0.0.0.0	# Local IP address if known. Dynamic = 0.0.0.0
REMOTE_IP=0.0.0.0	# Remote IP address if desired. Normally 0.0.0.0
NETMASK=255.255.255.0	# The proper netmask if needed
#
export TELEPHONE
# 
#
DIALER_SCRIPT=/etc/ppp/ppp-on-dialer
#
#
exec /usr/sbin/pppd debug lock modem crtscts /dev/modem 115200 \
	  kdebug 0 $LOCAL_IP:$REMOTE_IP \
	  user "la mia user_ID" \
	noipdefault netmask $NETMASK defaultroute connect $DIALER_SCRIPT


Questo invece è lo script /etc/ppp/ppp-on-dialer

#!/bin/sh
#
#
exec chat -v						\
	TIMEOUT		3				\
	ABORT		'\nBUSY\r'			\
	ABORT		'\nNO ANSWER\r'			\
	ABORT		'\nRINGING\r\n\r\nRINGING\r'	\
	''		\rAT				\
	''		\rATL2				\
	'OK-+++\c-OK'	ATH0				\
	TIMEOUT		30				\
	OK		ATDT$TELEPHONE			\


Nei file /etc/ppp/chapsecret e /etc/ppp/papsecret e' presente la riga:

"la mia user_ID"  *  "la mia password"  *

Il mio provider e' Tiscali e uso una RedHat 6.2.
Qualcuno puo' aiutarmi? 
Scusate la lunghezza del messaggio, grazie, ciao!