I've just started towork with netxms and i love it!

Now I wan't to check if a node is up (the mailserver to be specific) during an event proccessing policy before I continue to send an email.
I thought that it would make sense to use the filtering-script parameter in the event proccessing rule to check the status parameter of the mailserver node-object. But there is somehow no way I can check if my syntax is right. Even the trace(0,"message); function is not writing anything to the syslog and the print/println functions don't work there.

Than I thought I could check my syntax by creating a script in the script-library, but there is no "test" or "run" button.
How can i test the scripts?

Sorry for my newbee question, but I couldn't find any answer in the whole forum

Cheers