Works if called manualy

Hello

I tried to use this script on a debian 8 but I have the problem that
– if I call this check on a shell as root I will get an answer
– if I call this check on a shell as user nagios I will get an answer
BUT!! If the nagios-server will call this check I get the answer that I should install the perl-sdk??

Do you have any hints for me?

regards
Viktor