LINUX基于域名的虚拟主机问题，求高手指教

检查/home/httpd-2.2.21/bin/apachectl -S
报错信息[warn] VirtualHost 192.168.1.100:0 overlaps with VirtualHost 192.168.1.100:0, the first has precedence, perhaps you need a NameVirtualHost directive
[Wed Dec 07 10:57:12 2011] [warn] VirtualHost 192.168.1.100:0 overlaps with VirtualHost 192.168.1.100:0, the first has precedence, perhaps you need a NameVirtualHost directive
[Wed Dec 07 10:57:12 2011] [warn] NameVirtualHost 10.197.196.100:0 has no VirtualHosts
VirtualHost configuration:
192.168.1.100:* www.myweb.com (/home/httpd-2.2.21/conf/httpd.conf:242)
Syntax OK
怀疑是原httpd.conf默认中设置的站点信息和我设置的冲突，我已将原默认配置信息删除 ，难道是我没删干净吗？
我的配置信息如下
Listen 80
NameVirtualHost 192.168.1.100
<VirtualHost 192.168.1.100>
ServerName www.myweb.com
DocumentRoot /home/httpd-2.2.21/htdocs
ServerAdmin [email protected]
</VirtualHost>
<VirtualHost 192.168.1.100>
ServerName www.myweb1.com
DocumentRoot /var/www/myweb1
ServerAdmin [email protected]
ErrorLog /var/vhlogs/myweb1/error_log
TransferLog /var/vhlogs/myweb1/access_log
</VirtualHost>
<VirtualHost 192.168.1.100>
ServerName www.myweb2.com
DocumentRoot /var/www/myweb2
ServerAdmin [email protected]
ErrorLog /var/vhlogs/myweb2/error_log
Transferlog /var/vhlogs/myweb2/access_log
</VirtualHost>

<Directory /var/www>
Options FollowSymLinks
Allowoverride None
Order deny,allow
Allow from all
</Directory>

我是不是NameVirtualHost 192.168.1.100
放的位置不对啊？系统没认到这个指令，我不太会配httpd.conf，参照参考资料先做测试