problem of jstl with spring framework 3

i am writing 开发者_运维百科following code in my project with spring framework 3

<c:set var="s" value="hello"/>
<c:out value="${s}"/>

the out put should be hello but its comming ${s}

when i am running the same code in normal web project with out spring in that the code is working fine

kindly help.....

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found out the solution its in the web.xml change the version of webapps in my case i added the version parameter as follow

web-app version='2.5"

solved my problem