setting font of selected text in a JTextPane

[System_Error]

I just can't seem to figure this crap out. I already had to convert all my code into a JTextPane just so I could change the style of text, and now I can't get it to work.

Here is the junk I have so far:

 public void processBoldText()
 {
	 MutableAttributeSet keyWord = new SimpleAttributeSet();
		StyleConstants.setBold(keyWord, false);
	 int left = textArea2.getSelectionStart();
	 int right = textArea2.getSelectionEnd();
	 int length = right - left;
	 doc.setCharacterAttributes(left,length,keyWord, true);

 }