POST Parameters in Jigsaw

Hi, I'm developing an aplication with several servlets, but I cant make 
it run using Jigsaw, the problem is when I send a POST request with some 
parameters in the action field (something like this)

<form action="http://localhost:8001/servlet/MyServlet?param=anything 
method=POST>

...

</form>

I cant read the parameter "anything", I'm using the getParameter() 
function of the servlet API. I ran this app using servletrunner and 
everything works fine, but now I dont know if there is some special 
configuration en Jigsaw or something similar. Any advice will be helpfull

Thanks in advance

Andres Portillo