Get error in iSymphony

I just setup a new FreePBX and configured iSymphony. I’m able to login to the client but when I try to listen to voicemail or make calls I get this error

Can someone help me with this?

There was a problem initiating your call.

java.lang.IllegalStateException: Actions may only be sent when in state CONNECTED, but connection is in state DISCONNECTED
at org.asteriskjava.manager.internal.ManagerConnectionImpl.sendAction(ManagerConnectionImpl.java:942)
at org.asteriskjava.manager.internal.ManagerConnectionImpl.sendAction(ManagerConnectionImpl.java:884)
at org.asteriskjava.manager.DefaultManagerConnection.sendAction(DefaultManagerConnection.java:317)
at com.xmlnamespace.panel.proxy.asterisk.AsteriskServerConnectionHandler.sendAction(AsteriskServerConnectionHandler.java:333)
at com.xmlnamespace.panel.proxy.asterisk.AMIProxy.handleManagerMessageRequest(AMIProxy.java:546)
at com.xmlnamespace.panel.proxy.asterisk.AMIProxy$ManagerActionExecutor.run(AMIProxy.java:719)
at java.lang.Thread.run(Thread.java:748)