Flex和BlazeDS通信时异常：WebContent/messagebroker/amf'

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<flexProperties enableServiceManager="false" flexServerFeatures="4" flexServerType="2" serverContextRoot="/WebContent" serverRoot="D:/java/tomcat-6.0.18_For_UltraNms_Web/webapps/nmsw" serverRootURL="http://localhost:8080/nmsw/" toolCompile="true" useServerFlexSDK="false" version="2"/>

如下方法，重新使用BlazeDS设置Flex服务器，上下文跟目录一定要正确