Nagios :Problem Images

Hello,

I have installed and configured Nagios under Fedora without problém , my problem now with icones i use icon_image DBServer.gif statusmap_image DBServer.gd2
but it’s give me no image in the map of nagios


define host{
	use                         generic-host
	host_name                Server1
	alias                         EXCHANGE
	address                    10.5.1.10
        contact_groups          admins
        icon_image                 DBServer.gif
        statusmap_image         DBServer.gd2
	check_command           check-host-alive
	max_check_attempts      20
	notification_interval        60
	notification_period          24x7
	notification_options        d,u,r
        }

so I have to force the display with a command for example ?

Can you help me to solve this issue i will be thankful

Many thanks

does the DBserver.gif/png/gd2 file exist ?