What is the location of your images - I see that you are pointing to Images
folder in your application -- if this is the correct location then can you you should use the backwards slash to poin to the location like this:
Also check whether you have changed the Build Action of the images? Right-click on an image and then go to Properties. By default the Build Action should be Resource.
Are you applying any custom styles in xaml or in code-behind?
If you still have issues with this I suggest that you open a new support thread and attach a small code sample there so that I can further assist you (attachments in forums are limited to images only cause of licensing/security concerns).
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