php - No data in Icinga-web

I'am trying to get Icinga-web to work
properly.

I followed the following tutorial:
rel="nofollow">https://wiki.icinga.org/display/howtos/Setting+up+Icinga+Web+on+RHEL

This
works:

• Icinga
  classic web interface is working perfect. (This also means ido2db is working
  fine)


• The hosts and services are showing on the top of
  Icinga-web interface.


• The notifications in Icinga-web are
  working (Incl new events)


• Apache, Icinga and Ido2db are
  not showing any errors in the logs. (including full
  debug)

This
is NOT working:

When I
request data in Icinga-web I get => No data.
Except for the tab
notifications, they are
showing.

The server
configuration:

• Redhat
  6.x enterprise: 2.6.32-358.el6.x86_64


• Postgresql:
  PostgreSQL 8.4.13 compiled by GCC gcc (GCC) 4.4.6 20120305 (Red Hat 4.4.6-4),
  64-bit


• Icinga:
  v1.7.2

I did
some extra testing using the following tutorial. But I didn't find any problems =>
rel="nofollow">https://wiki.icinga.org/display/testing/Icinga+IDOUtils+Testing

Does
anyone have a similar problem ?

If not => how
would you debug a problem like this ?

Thanks
Ilias