I assume you have updated. If you upgrade from TFS 2010 to TFS 2012 RC (instead of TFS 11 Beta), now it is processed automatically. - Launch the Property Setup Wizard .
Your project probably lacks a definition of a new type of work item and related artifacts necessary for the code review function to work. On the same page I posted, there are links to instructions on how to add this part manually, but the property settings wizard is much less painful.
Ryan ryhle
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