Graphics for ChessApplet

[Alchemy]

Hi Dears
I am developing chess game written as an JavaApplet.
Using Borland JBuilder 9 Personal Edition.
I use the following Code
void this_mouseDragged(MouseEvent e)
{
}
class Chess_this_mouseMotionAdapter extends
java.awt.event.MouseMotionAdapter
{
Chess adaptee ;
Chess_this_mouseMotionAdapter ( Chess adaptee )
{
this.adaptee = adaptee ;
}
public void mouseDragged ( MouseEvent e )
{
adaptee.this_mouseDragged ( e ) ;
}
}
But it seems that it still fire when the mouse button is released.
The Applet are on the following URL
http://w1.201.telia.com/~u20100003/Chess.html

Verry Thankfull for Tips or Advice.
Sincerely
Urban Avierfj?
Gotland, Sweden