Popup Image not showing, but click and it shows?

Here is the code for my popups to show images (photos hyperlinked to a point):
?xml version="1.0" ?>
<configuration>
<title>Photo of Buried Utilities</title>
<description>
<![CDATA[<b>Date of Photo: </b>{GPS_Date}]]>
</description>
<fields>
<field name="GPS_Date" visible="false"/>
<field name="Photo_1_Link" visible="false"/>
</fields>
<medias>
<media type="image" imagesource="{Photo_1_Link}" imagelink="{Photo_1_Link}"/>
</medias>
</configuration>


Attached is what I see when I go into the Flex Viewer (3.6). When I click inside the empty frame where the image is supposed to appear, a separate window opens and the image appears. I would like the image to appear inside the empty frame also.

Attached Thumbnails