获得403服务器访问被拒绝

I have configured dotProject Project management tool with wamp server. But now I am getting 403 Access forbidden while i try to access it using ip address (http://ipaddress/). But if i use http://localhost/ i get access to it. What is the problem?

I have made changes in httpd:conf as Allow all instead of deny all.

thanks for the help Sneha