JTextPane first line read only

Question

Hi all!
I'm a beginner in java programming, that said im trying to make a simple text editor (who isn't?), it will be a part of another larger application, nevertheless this editor is a main component, just need some simple editing tips.
I want to use a JTextPane for the editable surface, this is working fairly well but i am not able access other lines in the editor except from the first one. Meaning that when containing a large piece of text, my JTextPane is only able to edit the first line: For instance the caret will only show it self on the first line, I can write new letters, but only on the first line and i can erase them and so on. What am I missing? Have checked around many places for solutions
To sum it up; I want to edit every line in my JTextPane instead of just the first one :)

Answer 1

Ok! thanks a lot for the good advice, ant help is most appreciated. :-)
Here is a piece of code that demonstrates my problem. Hope it brings insight! Try to write a line of text, then press enter to go to the next line, most probably you will find yourself unable to edit this line.
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.SwingUtilities;
public class Test implements Runnable
     public static void main(String[] args)
          SwingUtilities.invokeLater(new Test());
     public void run()
          JPanel cP = new JPanel();
          JTextPane tP = new JTextPane();
JScrollPane sP = new JScrollPane( tP );
tP.setPreferredSize(new Dimension( 400 , 400 ) );
          sP.setPreferredSize(new Dimension( 300 , 300 ) );
          tP.setEditable(true);
          cP.add(sP);
          JFrame f = new JFrame();
          f.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
          f.setContentPane( cP );
          f.setLocationRelativeTo( null );
          f.setVisible( true );
}