Stream Connection switching

Question

i made video gallery with "Live" button
problem is connection switching
when click on live button i want this code in my script
var nc:NetConnection = new NetConnection(this);
nc.connect("rtmpt://localhost/live");             
var ns:NetStream = new NetStream(nc);
ns.setBufferTime(defaultBuffer);
video_holder.videoClip.attachVideo(ns);
video_holder.attachAudio(ns);
video_holder.videoClip.smoothing = true;
ns.play('livestream');
and on any click thumbnail i want this code.
var nc:NetConnection = new NetConnection(this);
nc.connect(null);
var ns:NetStream = new NetStream(nc);
ns.setBufferTime(defaultBuffer);
video_holder.videoClip.attachVideo(ns);
video_holder.attachAudio(ns);
video_holder.videoClip.smoothing = true;
ns.play(toLoad);  //toLoad get the flv file        
so please tell me any if else condition or any other condition for connection switching.
you also see in attach txt file
from Line 122 to 142 is the required code

Answer 1

Thankyou shmoove. The code is here.
The server is setup to send information every 3 seconds to the client (upon client request,, which is working fine). For your reference,, the same code works perfectly fine with a Series 60 (midp2.0) phone, and so does the server. except that i use a SocketConnection for the midp 2.0 phone. For the very reason that midp 1.0 does not support the SocketConnection, i have to use a StreamConnection instead. the dataInputSream is bound with the StreamConnection object.
I think the StreamConnection is somehow not persistant ,, in the sense the connection is not maintained.
Please tell me whats wrong,
Thankyou,
Balaji.
public Alert alertConnBroken = new Alert("", "Due to weak wireless link, Connection to server lost. Please reconnect!!", null, AlertType.WARNING);
public String readString()
     String str = new String();
     while(true)
          try
               if((ch = (char) dataInputStream.read()) == -1)                   
                    display.setCurrent(alertConnBroken);
                    break;
               else
                  str = str + ch;
          catch(InterruptedIOException iioe)
               iioe.printStackTrace();
               break;
          catch (IOException ioe)
               ioe.printStackTrace();
               break;
            catch(EOFException eofe)                     
                eofe.printStackTrace();                                        
             break;
         catch (Exception e)
            e.printStackTrace();
             break;
     return str;