I would place "~/" as in "~/images/WeeklyStreamingVideo.gif". So that you can guarantee the search starts at the root of your application. For example, I believe if you've placed this in a master page, the search would start from the master page folder.

>In Default.aspx, I decided to add another image to the page. So, it looks like this:
>
>

><CENTER>
><asp:Image ID="Image4" runat="server" ImageUrl="images/WeeklyStreamingVideo.gif" width="400" height="37" />
></CENTER>
>

>
>This image exists. Because when I run the page, the image appears. But, the interface keeps putting a red line under the ImageUrl reference saying that the file does not exist. Anyone would know what I could try to make this go away?