I installed activemq 5.3 and when trying to start it getting error: Failed to execute main task. Reason: java.lang.NoClassDefFoundError: org.springframework.core.CollectionFactory
java version is: java version "1.5.0" Please help -- View this message in context: http://old.nabble.com/Failed-to-execute-main-task.-Reason%3A-java.lang.NoClassDefFoundError%3A-org.springframework.core.CollectionFactory-tp27279006p27279006.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.