Cannot create ADSL connection

I would like to thank those who aided me in using gedit last night. It appears that the line in question is not at fault as even if I comment it out the connection will not take place.

I have just loaded Ubuntu and attempted to create an ADSL login using the following procedure:
sudo ifconfig
sudo apt-get install pppoeconf
sudo pppoeconf
sudo pon dsl-provider
sudo ifconfig

At times, there is an error message stating that /dev/modem is unknown (incorrect?). At all times there is not a connection as I open up Firefox, type in a URL (eg www.google.com) and get a message stating that it cant find it as there is not connection.

Here is the full provider file from /etc/ppp/peers which this message is informing me about.

#############################################################################

# example configuration for a dialup connection authenticated with PAP or CHAP
#
# This is the default configuration used by pon(1) and poff(1).
# See the manual page pppd(8) for information on all the options.

# MUST CHANGE: replace myusername@realm with the PPP login name given to
# your by your provider.
# There should be a matching entry with the password in /etc/ppp/pap-secrets
# and/or /etc/ppp/chap-secrets.
user "<email address hidden>" #This has been edited for privacy, it does not appear like this in the actual file

# MUST CHANGE: replace ******** with the phone number of your provider.
# The /etc/chatscripts/pap chat script may be modified to change the
# modem initialization string.
 connect "/usr/sbin/chat -v -f /etc/chatscripts/pap -T ********"

# Serial device to which the modem is connected.
/dev/modem

# Speed of the serial line.
115200

# Assumes that your IP address is allocated dynamically by the ISP.
noipdefault
# Try to get the name server addresses from the ISP.
usepeerdns
# Use this connection as the default route.
defaultroute

# Makes pppd "dial again" when the connection is lost.
persist

# Do not ask the remote to authenticate.
noauth

###################################################################################

I wonder why this error appears as the file above seems to point exclusively to a dial up connection which obviously mine is not.

Could someone please assist?

Many thanks

Robin Wingrove