Hi, i am creating and Configuring the Struts for the first time, when I place the following Code in my jsp page

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic"%>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles"%>

I am getting the error when i move the mouse over the 1st Line "Duplicate Prefix "html"

When I move the mouse over the 2nd Line, I am getting as "Duplicate Prefix "html" Similarly for 3rd and 4th Line,

Can any one tell me why is this error all about

Thanks in advance