Debug Codeigniter Projects with Netbeans/Xdebug - How to Setup?

[eluser]Unknown[/eluser]
How should Netbeans/Xdebug/Codeigniter be set up to enable single step operation?

The environment:- Win 7 Prof 64 bit, Xampp 1.7.7, Netbeans 7.1.1, Xdebug and Codeigniter 2.2.

Have been using netbeans 7.1.1 for some time to debug plain php files and projects - successfully.

Recently started to use Codeigniter 2.2 - learning to use a framework.

Auto-complete works as expected but breakpoints, other than 'break on first line of page', only in first page (index.php), not working.

Advice would be appreciated.

Many thanks,

Ivan