WPF Using Image Control to dynamically view Online images

Situation

I'm trying to use an image control in my program that accesses an online image by binding it to a property.

XAML:

<Image Source="{Binding TheImage}" x:Name="imgPic" HorizontalAlignment="Left" Height="113" Margin="14,89,0,0" VerticalAlignment="Top" Width="120"/>

Specifically, I'm binding to the return value of the searchMembers method (which returns an object) mempic contains a URL, and this mempic will change depending on which member is currently logged in.

View Model:

public Uri TheImage
        {
            get { return new Uri(hillracing.searchMembers(Username).mempic); }
        }

Problem

Neither this code, or a static link to the image actually works.

Here is the test image I'm actually using http://ift.tt/1Pl9nRO

wondered if anyone could tell em what I was doing wrong.

thanks.