how to reconnect remoteapp in Windows Server 2008

Hi,i am writing an remoteapp activex in C# using the rdp library.I can start a program at the start connect,and lauch Multiple 

programs,but if i close all the  programs.after a few minutes,may be one or tow ,the connect is disconnected.there is a function 

named reconnect in the interface imsrdpclient8,but the reference i added has only interface  imsrdpclient 1 to 6,and not 7,8.so i 

had to call the connect function again,but the program only runs in the server (no show in the client) 

here is part of code:            

               if (rail.Connected == 0)

                    { 
                        setServer(ip, useranme, password, domain);
                        rail.OnConnected += new EventHandler(sendExe);
                        rail.OnDisconnected += new AxMSTSCLib.IMsTscAxEvents_OnDisconnectedEventHandler(ee);
                       // ((IMsRdpClientAdvancedSettings)rdp.AdvancedSettings).shutdownTimeout = 60;
                        i5 = (IMsRdpClient6)secured;
                        i5.RemoteProgram.RemoteProgramMode = true;
                        isCon = true;
                        rail.Connect();
                    } esle if (rail.Connected == 1){

 i5.RemoteProgram.ServerStartProgram(this.program, null, null, false, null, false);

}

public void sendExe(object sender, EventArgs e)

{ 

i5.RemoteProgram.ServerStartProgram(this.program, null, null, false, null, false);
}
can anyone help me?
thanks any reply.