Nagios Error Could not read object configuration data!

Hello All

I know its just me not knowing how to configure it but I
find the help documentation for nagios does not exactly apply to
my install that came with the newest cactiez iso I used
many of the default paths listed in the faq are not the same
as my install

Would anyone be so kind as to provide a for dummies procedure
on how to get it working it seems to have installed fine other
than this error which I am sure just needs a little kick start
any help would be appreciated
Thanks Much
MD