ontouch and onclick on a textview not working

have a look at the code below...
i am setting the onclick listener on the textview and the ontouch listener but none of them is working...

what seems to be the problem>....?

    AlertDialog.Builder builder;
     AlertDialog a;
     TextView text,txtNewUser ;
     ImageView image;
     View layout;
     Button ok;
     String pswrd;
     LayoutInflater inflater;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         // TODO Auto-generated method stub
         super.onCreate(savedInstanceState);
         final Context mContext = this;
         Dialog dialog = new Dialog(mContext);
         inflater = (LayoutInflater) mContext
                 .getSystemService(LAYOUT_INFLATER_SERVICE);
         ok = (Button) findViewById(R.id.buttonOK);
 
         dialog.setContentView(R.layout.custom_dialog_private_space);
         dialog.setTitle("Password");
         dialog.setCancelable(true);
         layout = inflater.inflate(R.layout.custom_dialog_private_space,
                 (ViewGroup) findViewById(R.id.layout));
         text = (TextView) dialog.findViewById(R.id.tvDesc);
         txtNewUser = (TextView) dialog.findViewById(R.id.tvNewUser);
 
         image = (ImageView) layout.findViewById(R.id.image);
         image.setImageResource(R.drawable.lock_symbol_android);
 
         builder = new AlertDialog.Builder(mContext);
         builder.setView(layout);
 
         a = builder.create();
         a.show();
 
         txtNewUser.setOnTouchListener(new OnTouchListener() {
 
             @Override
             public boolean onTouch(View v, MotionEvent event) {
                 // TODO Auto-generated method stub
                 if(event.getAction() == MotionEvent.ACTION_UP)
                 Toast.makeText(mContext, "Clicked", Toast.LENGTH_SHORT).show();
                 Log.v("AS", "Clicked");
     return true;
 
             }
         });
 
 txtNewUser.setOnClickListener(new View.OnClickListener() {
 
     @Override
     public void onClick(View v) {
         // TODO Auto-generated method stub
         Toast.makeText(mContext, "Clicked", Toast.LENGTH_SHORT).show();
         Log.v("AS", "Clicked");
     }
 });
     }
 

here is the code of textview from the xml of the dialog layout

<?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:orientation="vertical"
     android:id="@+id/layout" >
 
 <TextView android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:id="@+id/tvNewUser"
     android:text="New User?"
     android:layout_gravity="top|left"
     android:clickable="true"
 
     />
 
     <ImageView
         android:id="@+id/image"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
        />
 
     <TextView
         android:id="@+id/tvDesc"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:text="Enter password"
         android:textAppearance="?android:attr/textAppearanceLarge" 
         />
 
 
 
     <EditText
         android:id="@+id/etPassword"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:ems="100"
         android:inputType="textPassword" >
 
 
     </EditText>
 
     <Button
         android:id="@+id/buttonOK"
         android:layout_width="100dp"
         android:layout_gravity="center"
         android:layout_height="fill_parent"
         android:text="OK" />
 
 </LinearLayout>
 

---