Cant see the statusmap.cgi

Hello All,
I am new at nagios,i installed the nagios 3.0.6.I added the hosts and services, it works fine but when i click the Status Map,Trends and Alert Histogram.The page gives "The requested URL /nagios/cgi-bin/statusmap.cgi was not found on this server.“The requested URL /nagios/cgi-bin/trends.cgi was not found on this server.”“The requested URL /nagios/cgi-bin/trends.cgi was not found on this server.” error.Does anyone help me how i overcome this problem.

Thanks