[TxMt] Need help with custom language highlightning

Hi,

Could you help me to make a custom language colorization! I have followed the short tutorial on the website http://manual.macromates.com/en/language_grammars but it didn't work for me, so I simplified it as much as possible but still no success. I guess there is something simple which I am missing. How can I make the following definition working:

{ scopeName = 'source.serpent';

fileTypes = ( 'serpent' );

patterns = (

{ begin = '<?';

end = '?>';

patterns = ( { include = 'source.php'; } );

},

); }

it does not highlight php insertions in my file, but the standard language definition for php (supplied with the editor) does it.

What do I need to do?

Thanks, nuke