Passing arguments from webapp to jahia

Hi all,

I have a problem: i want to use a webapp-positionned variable in my jahia
template that contains the webapp.

In the webapp dev guide i can read that i need to use request attribute in
the direction "webapp->jahia" (in "jahia->webapp" i've used session
attributes and it works fine)

so in my webapp, i set:
request.setAttribute("test", "test");

and in my template i want to retrieve it:
String test = (String) request.getAttribute("test")

result: test is always null......

Could you help me please? it's quite an emergency

Thanx a lot.