filter servlet not get executed in websphere6.0.0.1

[mahesh shinde]

i am using websphere6.0.0.1 application server.
I have my custom session tracking filter.
but it dont get executed even i tried wildcard urlpattern.

   
                <filter>
		<filter-name>trackSessionFilter</filter-name>
		<filter-class>com.filter.TrackSessionFilter</filter-class>
		<init-param>
			<param-name>avoid-urls</param-name>
			<param-value>login_screen.jsp</param-value>
		</init-param>		
	</filter>
	<filter-mapping>
		<filter-name>trackSessionFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>	
 

this my web.xml snippet.
no exception and nothing get printed

[mahesh shinde]

please give any idea guys