value used in .xml is not accepted as argument.

Hi,
In the skin xml there is a certain value that is used .
I want to send it as argument with Runscript, but i keep having only sys.argv[0]

xml:
<label>$INFO[Container(10051).ListItem.Label]</label> 

and i add:

xml:
<onclick>RunScript(script.tmdb.downloader, $INFO[Container(10051).ListItem.Label])</onclick> 

i try to put into "", without success.

What's wrong with that ?