MWS 8.2 Error connecting to broker

ANyone had this error and resolved. please post the resolution…

When conneting from MWS 8.2 to Broker 8.2 both running on my Win7 localhost, adding the broker server from the MWS console. gives me below error:

856 The operation failed due to an unknown command in the protocol.
com.webmethods.messaging.tools.api.core.MessagingToolException: 856
at com.webmethods.messaging.tools.api.broker.BrokerServerFacade.findMonitorPort(BrokerServerFacade.java:1063)
at com.webmethods.messaging.tools.api.broker.resourceobjects.MessageServerResourceObject.getMonitorPort(MessageServerResourceObject.java:222)
at com.webmethods.messaging.tools.api.broker.resourceobjects.MessageServerResourceObject.getResourceProperty(MessageServerResourceObject.java:4167)
at com.webmethods.messaging.tools.api.core.session.MessagingToolWebSession.getResourceProperty(MessagingToolWebSession.java:280)
at com.webmethods.messaging.tools.api.broker.pref.MessagingServerPreference.addServer(MessagingServerPreference.java:71)
at com.webmethods.caf.msg.msgutil.BrokerServerUtil.addBrokerServer(BrokerServerUtil.java:70)
at com.webmethods.caf.msg.serveradd.ServerAddaddbrokerserverView.addBrokerServer(ServerAddaddbrokerserverView.java:98)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sun.el.parser.AstValue.invoke(AstValue.java:187)

Broker servername : localhost
Monitor port: 6850