Throwing java.io.IOEXception:stream closed, when recording voice from an applet

<pre>
I have developed a small applet which will record voice in wave format and play it.
If I run this in IE it is working perfetly alright, but if i run it in Mozilla in "Linux",

sometimes it will run successfully and sometimes it will throw "java.io.Exception: stream closed".
So, here is the code, I hope i'll get the solution soon.
Thanx

I have made the line very bold and red in color where i am getting the error.
public void actionPerformed(ActionEvent e)
{



if(e.getActionCommand().equals("Record")) //Recording Media
{
act="Record";
rectimerstop=false;
stopped=false;
new Player(this).start();
System.out.println("time is : " + time);
new RecordTimer(time).start();
record.setEnabled(false);
test.setEnabled(false);
recStop.setEnabled(true);
bottomLabel.setText("Recording........");
getAppletContext().showStatus("<<Hello Mike est>>");
}
else
if(e.getActionCommand().equals("Play")) //Playing Media
{
act="Play";
stopped=true;
playtimerstop=false;
new Player(this).start();
play.setEnabled(false);
playStop.setEnabled(true);
bottomLabel.setText("Playing........");
getAppletContext().showStatus(">>");

}
}


<b>Class which records and play back</b>


class Player extends Thread
{

Applet appl;

Player(Applet appl)
{
this.appl=appl;

}

/* This method records the Media from the Microphone */

public void record()
{

System.out.println("iside recorde and record will start in a moment");
try
{
if(clip!=null)
{
clip.stop();
clip.close();
ai.close();
}

if(tadl!=null)
{
tadl.stop();
tadl.close();
ai.close();
}





File fos=new File(recfilename);
System.out.println("file exists :" + fos.exists());
if(!fos.exists())
fos.createNewFile();

System.out.println("file exists :" + fos.exists());

System.out.println("in record");

System.out.println("format is" + format);
if(format==null)
{
System.out.println("format is null and initialising");
format=new AudioFormat(8000,16,2,true,false);
}


bottomLabel.setText("Recording.........");
Line.Info info = new DataLine.Info(TargetDataLine.class,format);
Mixer.Info mi[]=AudioSystem.getMixerInfo();
//for(int i=0;i<mi.length;i++)
//System.out.println(mi[i]);
tadl=(TargetDataLine)AudioSystem.getLine(info);
ai=new AudioInputStream(tadl);
System.out.println("file is " + recfilename);

filename=recfilename.substring(recfilename.lastInd exOf("/")+1,recfilename.length());
System.out.println("tadl is running " +tadl.isRunning());
tadl.open(format);

System.out.println("Recording started");
tadl.start();
System.out.println("ai is" + ai);
System.out.println("AudioFileFormat.Type.WAVE is" + AudioFileFormat.Type.WAVE);
System.out.println("fos is" + fos);

AudioSystem.write(ai,AudioFileFormat.Type.WAVE,fos );
ai.close();


}
catch(Exception e)
{
bottomLabel.setText(e.toString());
e.printStackTrace();
}

}

/* This method plays the Media */

public void play()
{

try
{
if(tadl!=null)
{
tadl.stop();
tadl.close();
ai.close();
}
System.out.println("in play");

System.out.println(recfilename);
urltype=recfilename.substring(0,recfilename.lastIn dexOf("/")+1);
if(!vMail.equals("none")){
audiUrl=new URL("<A href="file://"+urltype+playf">file://"+urltype+playf);
System.out.println("url is " + audiUrl);
}
else
audiUrl=new URL("<A href="file://"+playfilename">file://"+playfilename);
//System.out.println(audiUrl);
String med=audiUrl.toString();
if(med.indexOf("/")>0)
getAppletContext().showStatus(med.substring(med.la stIndexOf("/")+1,med.length()));
else
getAppletContext().showStatus(med.substring(med.la stIndexOf("<A href="file://\")+1,med.length">\\")+1,med.length()));
ai = AudioSystem.getAudioInputStream(audiUrl);

AudioFormat format = ai.getFormat();
if (format.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) {
format = new AudioFormat(
AudioFormat.Encoding.PCM_SIGNED,
format.getSampleRate(),
format.getSampleSizeInBits()*2,
format.getChannels(),
format.getFrameSize()*2,
format.getFrameRate(),
true); // big endian
ai = AudioSystem.getAudioInputStream(format, ai);
}

DataLine.Info info = new DataLine.Info(Clip.class, ai.getFormat(), ((int)ai.getFrameLength()*format.getFrameSize()));
clip = (Clip) AudioSystem.getLine(info);
clip.open(ai);
playtime=clip.getMicrosecondLength()/(1000*1000);
clip.start();
new PlayTimer().start();



}catch(Exception e)
{
bottomLabel.setText(e.toString());
e.printStackTrace();

}

}

public void convert()
{
//implemented in v1.1


}



public void run()
{
if(act.equals("Record"))
{
record();
}
else
{
play();

}
}

}




<b> Timer Class which displays the record time left against record time
* available and also resets the buttons on the applet
</b>

class RecordTimer extends Thread
{
int time=0;
int secs=0;
RecordTimer(int time)
{
this.time=(time*60);
//System.out.println(time);
}


public void run()
{

try
{

while((secs-1)<time && !rectimerstop)
{
sleep(1000);
secs++;
//System.out.println(secs);
bottomLabel.setText("Recording..Secs: "+secs+" of "+time);
if(record.isEnabled())
{
record.setEnabled(false);
test.setEnabled(false);
}

}
bottomLabel.setText("Recording Stopped.........in RecordTimer by user");
sleep(5000);
System.out.println("status of tadl is " + tadl);
if(tadl!=null)
{ System.out.println("Before tadl stopped");
tadl.stop();
System.out.println("tadl stopped");
tadl.close();
System.out.println("tadl close");
//ai.close();
//System.out.println("ai close");
stopped=true;
bottomLabel.setText("Ready.......For Test.........");
getAppletContext().showStatus("(.)");
}

test.setEnabled(true);
recStop.setEnabled(false);
uploadMedia.setEnabled(true);

}catch(Exception ex){bottomLabel.setText(ex.toString());}

}



}

</pre>