The first thing I'd do to debug this is put a System.out.println inside the setUsers() method on the form bean to see whether it's being called or not. If it is being called, there's something funny going on in your form bean. If it's not getting called, check the spelling to make sure the property name in the
jsp matches the setter name on the form bean.
If these approches don't work, show us:
-The relevant portions of the form bean
-The relevant portions of struts-config.xml
-The jsp <html:form> tag.