Hi, I am having trouble getting the value of the request parameter from my view to action method. Can someone please help explain what I am doing wrong?

VIEW:
            <h:commandButton value="Submit" action="#{postingAction.confirm}">
                <f:param name="subCatId" value="1" />
            </h:commandButton>

ACTION:

           @Name("postingAction")
           @Scope(ScopeType.CONVERSATION)
           public class PostingAction implements java.io.Serializable {

            @RequestParameter
                 Long subCatId;

          public void confirm() {          
                System.out.println(subCatId);  // this prints NULL
             }
            ...
           

Thank you.