[Chameleon] Problem runnig chameleon demo

[BAUD remi]

Hi,
 
I got a problem when I run: http://localhost/ms4w/apps/chameleon_sample/htdocs/index.phtml
the fatal error is:

Fatal error: Class sampleapp: Cannot inherit from undefined class chameleon in D:\ms4w\apps\chameleon_sample\htdocs\index.phtml on line 14

My directories configuration is: D:\ms4w\apps and then I place the two directories chameleon and chameleon_sample.
 
when I set (in index.phtml : include( /ms4w/apps/chameleon/htdocs/chameleon.php <http://localhost/ms4w/apps/chameleon/htdocs/chameleon.php> " ); It fails to open chameleon.php
but if i set include( "http://localhost/ms4w/apps/chameleon/htdocs/chameleon.php" ); there is no problem.
(Just the fatal error)
 
I've set in http.conf (for apache) an Alias for   "D:\ms4w\"       as     /ms4w/
Was it the right thing to do??
 
 
 
Best Regards !