my problem resolved!
<%@ page language="java" errorPage="/error.jsp" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8" %>
I was added above tag in my common/taglibs.jsp
file and include it in my jsp files with this command:
<%@ include file="/common/taglibs.jsp" %>
So this tag not importable, and should be used directly in every jsp file!
Sorry for my bad English.