Array with jstl

I'm trying to use array with jstl

Sample of code
........
<c:set value="0" var="i"/>
<c:forEach items="${ stmt.rows }" var="row">
   <c:set value="${i+1}" var="i"/>
   <c:out value="${ row.l_element }"/> <br>
   <c:set scope="page" value="${ row.l_element }" var="titre[i]"/>
</c:forEach>
<c:set value="${i}" var="nbrTitre"/>
<c:out value="${ nbrTitre }"/> <br>
<c:forEach begin="0" end="${nbrTitre}" var="j" varStatus="t" >
     array : <c:out value="${ titre[j] }"/> <br>
     var : <c:out value="${ t.index }"/> <br>
</c:forEach>
.......

The page works fine but there is nothing in the array.

row.l_element is a string.

What's wrong?

Francis