fedora15拨号上网的问题？大侠们，救命啊！！！

总是连不上网，代码信息如下：
pppoe-status: Link is down (can't read pppoe PID file /var/run/pppoe.conf-pppoe.pid.pppoe)

[root@tangkunyin sysconfig]# pppoe-start
................TIMED OUT
/usr/sbin/pppoe-start: line 193:  7036 Terminated              $CONNECT "$@" > /dev/null 2>&1

[root@tangkunyin sbin]# pppoe-start
................TIMED OUT
/usr/sbin/pppoe-start: line 193:  3506 Terminated              $CONNECT "$@" > /dev/null 2>&1

[root@tangkunyin sbin]# pppoe-status
pppoe-status: Link is down (can't read pppoe PID file /var/run/pppoe.conf-pppoe.pid.pppoe)

[root@tangkunyin sbin]# ifup ppp0
/usr/sbin/adsl-start: line 217:  3906 Terminated              $CONNECT "$@" > /dev/null 2>&1

[root@tangkunyin sbin]# pppoe-status
pppoe-status: Link is down -- could not find interface corresponding to
pppd pid 9849

确定网络没有问题吗？先在xp下拨号试试，确定线路方面有没有问题。