Syntax error : identifier 'NetClassGroupGame'

Any idea why this would be happening? I have all include directories I need and am linking to the lib ok.

Here is my code up to the point that it errors out:

#include "tnl.h"
#include "tnlEventConnection.h"
#include "tnlNetInterface.h"
#include "tnlRPC.h"
#include

bool gQuit = false;

using namespace TNL;

class SimpleEventConnection : public EventConnection
{
typedef EventConnection Parent;

public:
TNL_DECLARE_NETCONNECTION(SimpleEventConnection);
TNL_DECLARE_RPC(rpcMessageClientToServer, (const char *theMessageString));
TNL_DECLARE_RPC(rpcMessageServerToClient, (const char *theMessageString));

};

TNL_IMPLEMENT_NET_CONNECTION(SimpleEventConnection, NetClassGroupGame, true);

There is where I get the Syntax error : identifier 'NetClassGroupGame'