It will be helpful if you post the part of your struts-config.xml here. What is the scope of your form bean. If it is a request one that only the 'label' information will be stored in it. However there should be a setLabel() method present in the form class.
This doesn't work for the simple reason that clicking on a link does not submit a form. If you want to sumit the form, change the link to a submit button and make reqCode and level hidden fields on the form.