Longview - Unable get apache status when using Varnish

I have a CentOS 6 Apache server. The varnish took the port 80, Apache use port 8080. In /etc/linode/longview.d/Apache.conf file, I have:

location http://127.0.0.1:80/server-status?auto

but got the following errors when browsing Apache in Longview. I tried both port 80 and 8080, and restarted httpd, varnish and longview. Any advice would be appreciated.

Unable to access local server status for Apache at http://127.0.0.1:8080/server-status?auto: 404 Not Found

Unable to access local server status for Apache at http://127.0.0.1:80/server-status?auto: 404 Not Found