j'ai toujours un probleme avec mon adsl

lorsque je tape modem_run ça fonctionne parce kil me renvoie ADSL line goes up
pppd call adsl puis sbin/ifconfig me renvoie ppp0 erreur lors de la recherche d'infos sur l'interface, périphérique non trouvé

voila le resultat de tail -f /var/log/messages

ADSL line is up, downstream at 608 kbit/s, upstream at 160 kbit/s
ADSL link goes UP
[root@localhost bin]# pppd call adsl
[root@localhost bin]# tail -f /var/log/messages
Nov 10 13:04:53 localhost kernel: PPP generic driver version 2.4.2
Nov 10 13:04:53 localhost pppd[998]: pppd 2.4.1 started by root, uid 0
Nov 10 13:04:53 localhost pppd[998]: Using interface ppp0
Nov 10 13:04:53 localhost modprobe: modprobe: Can't locate module tty-ldisc-13
Nov 10 13:04:53 localhost pppd[998]: Connect: ppp0 <--> /dev/pts/2
Nov 10 13:04:53 localhost pppd[998]: ioctl(PPPIOCSASYNCMAP): Inappropriate ioctl for device(25)
Nov 10 13:04:53 localhost pppd[998]: tcflush failed: Input/output error
Nov 10 13:04:53 localhost pppd[998]: Exit.
Nov 10 13:04:53 localhost /etc/hotplug/net.agent: NET unregister event not supported
Nov 10 13:04:53 localhost /etc/hotplug/net.agent: assuming ppp0 is already up

merci de m'aider si vous voyez d'ou vient le probleme