Deploying ReportViewer web control inside Reporting Services 2005 website

if your web application is using ReportViewer web control, it will throw the exception:

The type Microsoft.ReportingServices.UI.WebControlConnection,
ReportingServicesWebUserInterface, Version=9.0.242.0, Culture=neutral,
PublicKeyToken=89845dcd8080cc91 does not implement
IReportServerConnection or could not be found

its your application inheriting appSettings from parent's site web.config.
To resolve this, modify your applications' web.config as

<appSettings>
<remove key ="ReportViewerServerConnection"/>
<remove key ="ReportViewerTemporaryStorage"/>
</appSettings>

Powered by ScribeFire.