2-Way Communication between classes

Using:  MS Visual Studio 6.0 & Unix

Situation:  I'm creating a simulation of the MVA.  I have 2 classes that need to communicate to each other, and Event and Mva class.

Problem:  Having a clean compile between the two.  In other words my Event class when i compile it says:
         ---- Event.cpp ----
   'Event' : function should return a value; 'void' return type assumed
   syntax error : missing ';' before 'public'
   'operator <' must have at least one formal parameter of class type

          ----- Mva.cpp ------
   syntax error : identifier 'Event'
   'Queue' : 'Event' is invalid as template argument '#1', type expected

so it seems it's not recognizing my Event class as a "class".????

---------------------------------------------------------------------------------------------------------

****** Event.h********
#ifndef EVENT_H
#define EVENT_H

class Mva;
class Event()
{
      public:
                                Event();
                                void execute(Mva &);
                .
                .
                private:
                .
                .
};

***** Event.cpp ******
#include "Mva.h"


***** Mva.h *********
#ifndef MVA_H
#define MVA_H

#include "Event.h"
class Mva
{
      public:
            Mva();
                                bool getNextEvent(Event &);
                                .
                                .
                private:
                                Queue<Event>  eventList;
                                .
};