using WowzaMediaServer 3.1.1, debian squeeze, java-6 I´m trying to run a "live-record"-application with limiting stream-viewers. The wms-plugin-collection is installed. But when I want to connect with FlashMediaLiveEncoder to the server, the live encoder doesn´t get any response from server.

After starting the server manually and when "connecting" to server with live encoder I get the following log:

Access-Log here:
INFO server comment - Wowza Media Server is started!
Exception in thread "VHostHandler._defaultVHost_.18" java.lang.UnsupportedClassVersionError: com/wowza/wms/plugin/collection/module/ModuleLimitStreamViewers : Unsupported major.minor version 51.0

		<!-- Properties defined here will be added to the IApplication.getProperties() and IApplicationInstance.getProperties() 

collections -->
Any hints?