jstl in portlets

Hi,

I'm trying to use jstl within my portlet but have some troubles getting 
a simple forEach loop to work (see code snippet below). Are there 
certain limitations on using jstl in portlets?

Regards,
Andi

// bean.getAllToys() returns a Vector
<c:forEach var="toy" items="<%= bean.getAllToys().elements() %>" >
    <c:out value="${toy}" escapeXml="false" /><br />
</c:forEach>