After installing my nagios server on sles10sp2 via this "Cool Solutions" Article:
Cool Solutions: Nagios 3.0 - A Extensible Host and Service Monitoring
I have also added a few OES2SP1 servers to nagios, but when trying to monitor disk usage with the following command

./check_remote [oes-server] check_disk -w 10 -c 5

I get the following error:

DISK CRITICAL - /_admin is not accessible: Permission denied

Strange thing is that the nagios server itself is monitored perfectly and the check_lvm service (which is also run by check_remote) works fine.

Can someone help with this?