During the installation of the DotNetNuke Microsoft pivot module, it is necessary to several changes to be made to the web.config file. These changes allow the Silverlight pivot technology to operate on the DotNetNuke website.
Please remove the following things under <system.web>
<add verb='*' path='*.cxml' type='iwebs.Modules.Pivot.CXMLHandler,App_SubCode_Pivot' validate='false'/>
<add verb='*' path='*.jpg' type='iwebs.Modules.Pivot.TileHandler,App_SubCode_Pivot' validate='false'/>
<add verb='*' path='*.dzc' type='iwebs.Modules.Pivot.DZCHandler,App_SubCode_Pivot' validate='false'/>
<add verb='*' path='*userprofile.aspx' type='iwebs.Modules.Pivot.ProfileHandler,App_SubCode_Pivot' validate='false'/>
Also the ones under </system.webServer>
<add name='CXMLHandler' verb='*' path='*.cxml' type='iwebs.Modules.Pivot.CXMLHandler,App_SubCode_Pivot' validate='false' preCondition='integratedMode'/>
<add name='JPGHandler' verb='*' path='*.jpgx' type='iwebs.Modules.Pivot.TileHandler,App_SubCode_Pivot' validate='false' preCondition='integratedMode'/>
<add name='DZCHandler' verb='*' path='*.dzc' type='iwebs.Modules.Pivot.DZCHandler,App_SubCode_Pivot' validate='false' preCondition='integratedMode'/>
<add name='ProfileHandler' verb='*' path='*userprofile.aspx' type='iwebs.Modules.Pivot.ProfileHandler,App_SubCode_Pivot' validate='false' preCondition='integratedMode'/>
<add name='TileHandler' verb='*' path='*_files/*/*_*' type='iwebs.Modules.Pivot.TileHandler,App_SubCode_Pivot' preCondition='integratedMode,runtimeVersionv2.0'/>
