Configuring host object definitions

Hi folks

I\ve been trying to setup Nagios over the last week or so, but I just can’t seem to get any input to show up on the host details page… I have made an object definition file for a switch, but it says ‘host has not been checked yet’ and for localhost it says ‘(NO OUTPUT!)’

Could one of you wizards tell me how i borked the cfg file?

define host{
host_name test-switch
alias Dell Powerconnect 3448
address 10.1.56.16
check_command check-host-alive
max_check_attempts 5
check_period 24x7
process_perf_data 0
retain_nonstatus_information 0
contact_groups admins
notification_interval 30
notification_period 24x7
notification_options n
}