overlay images retrieved from a Database

Hi there, I have a image of a map and want to overlay a set of images with x
y coords from a database.
This is my code which does not work!
                    <img:image 
                        src="/images/map_01.gif" 
                        dir="generated" 
                        name="map_rendered.jpg" 
                        attributes="alt='A sample image'"
                        refresh="true"
                        quality="1.0">
                        <img:resize scale="100%" />
                        <!--load all points to map -->
                        <c:forEach var="poimaps"
items="${requestScope.poimaps}">  
                            <img:overlay x="${poimaps.x_id}"
y="${poimpas.y_id}" color="0xffffff" tolerance="35">
                                <img:image
src="/images/${poimaps.imageName}.gif"> </img:image>
                            </img:overlay>
                            
                        </c:forEach> 
                        
                    </img:image>

This is the error message!
javax.servlet.ServletException: Overlay must be a nested tag of Image Tag!

Help would be appreciated
Mike greece...
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