安装的时候报name is not bound in this context？

<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE Context>
 <Context reloadable="true" crossContext="true">
     <WatchedResource>WEB-INF/web.xml</WatchedResource>
<Resource name="jdbc/orcl"  
02.                auth="Container" 
03.              type="javax.sql.DataSource"  
04.              driverClassName="oracle.jdbc.driver.OracleDriver" 
05.              url="jdbc:oracle:thin:@127.0.0.1:1521:orcl" 
06.              username="ibs"  
07.              password="ibs"  
08.              maxActive="20"  
09.              maxIdle="10" 
10.              maxWait="-1"/> 
</Context>