Did you read the documentation? This is for Apple machines not OpenSUSE so i'm pretty sure you havent installed Airport Utility v5.6.1 as required by the app. Note the author also says it has to be version 5.6.1 as latest versions removed this capability.
Yes, I read the one sentence of documentation, and assume I needed to enable SNMP, which I did using Airport Utility 5.6.1 on my MAC Mini. On my OPenSUSE machine which runs Splunk 6.3 Enterprise, I added the Airport APP. No data in Splunk from my Airport Extreme, is there anything else that need to be done. With so little documentation I wonder if I am missing something.
You can send Syslog by exporting the baseconfg file to your machine and reuploading it via the current Airport App.