Problem starting Apache from AMS rootinstall

I have installed AMS 5 in my CentOS . There was no error in installation. But when i browse with the ip, nothing shows in the browser so i check port 80

netstat -tulpn | grep :80

there are no service listenting port 80 then i get back to the Apache in ams rootinstall to start apache and run

[root@host.rafi.com bin]# ./httpd -k start

httpd: Could not open configuration file /home/Apache2.2.21_x64/conf/httpd.conf: No such file or directory

Why this /home/Apache2.2.21_x64/conf/httpd.conf ?

Please suggest me some sollution to fix this problem.

Thanks

Rafi