Dear Sandy,
Please change:
<dotnetgallery:gallerybrowser id="dotnetgallery1" GalleryFolder="~/PhotoContest/Photos"
GalleryClient="~/Photocontest/CuteSoft_Client/Gallery/" runat="server"
AllowEdit="True" Width="620px">
</dotnetgallery:gallerybrowser>
to
<dotnetgallery:gallerybrowser id="dotnetgallery1" GalleryFolder="~/PhotoContest/Photos"
GalleryClient="Photocontest/CuteSoft_Client/Gallery/" runat="server"
AllowEdit="True" Width="620px">
</dotnetgallery:gallerybrowser>
After done, please try it again.
Keep me posted.