Configuring Microsoft Internet Information Services (IIS) Manager for SharePoint 2010
After you install Microsoft SharePoint Portal Server 2010,
you must configure the Internet Information Services (IIS) software
to set up the session modules for use with Web Parts.
After deploying the Cognos® web parts, ensure that the SharePoint site in IIS has the "Session" module enabled. To set up the session modules, select a managed module.
The following instructions apply to Windows Server 2008 and Microsoft SharePoint Portal Server 2010 bundled with IIS version 7.