1. A sentence is missing from the web. config file in the C: \ Program Files \ Common Files \ Microsoft Shared \ web server extensions \ 60 \ TEMPLATE \ LAYOUTS directory.
<Add name = "Session" type = "System. Web. SessionState. SessionStateModule"/>
In <HttpModules>
<Clear/>
<Add name = "OutputCache" type = "System. Web. Caching. OutputCacheModule"/>
<Add name = "WindowsAuthentication" type = "System. Web. Security. WindowsAuthenticationModule"/>
<Add name = "Session" type = "System. Web. SessionState. SessionStateModule"/>
</HttpModules>
2. In the IIS publishing directory of the SPS portal, find the web. config, modify the enableSessionState in Pages to true. After modification, it should be like this: <pages enableSessionState = "true" enableViewState = "true" enableViewStateMac = "true" validateRequest = "false"/>
For how to change the WSS, see
Http://support.microsoft.com/default.aspx? Scid = kb; en-us; 837376