求助fedora不能正常上网的问题。。。

我是linux菜鸟，今天才刚接触linux。买了一个正版盒装fedora9.0。但是装好系统不能上网呀。
我使用的电信adsl，使用宽带路由器，dhcp自动获取ip。ping网关，都正常。使用ifconfig命令看到ip地址也能自动获取上。
但是就是不能上网，右上角的网络还是中间有个红色de小x。好郁闷亚，使用network start命令报如下错误，请求高手求助呀。。。

正在决定 eth0 的 IP 信息...dhclient(5560) is already running - exiting.

This version of ISC DHCP is based on the release available
on ftp.isc.org. Features have been added and other changes
have been made to the base software release in order to make
it work better with this distribution.

Please report for this software via the Red Hat Bugzilla site:
http://bugzilla.redhat.com

exiting.
失败了。
[失败]
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists

[ 本帖最后由 pure810 于 2008-9-30 10:48 编辑 ]