WpfControl TestCase steps

Hello I am getting following error in TestCase workitem steps field. any one can tell me how can i solve this control for TFS 2013. TF400939: The custom control type 'Microsoft.TeamFoundation.TestManagement.Controls.RichTestStepsCustomControl' does not implement the IWorkItemControl interface or is compiled for a different version of Visual Studio.
Type: Unassigned
Status: Proposed
Reported: 13.10.2014 3:56:12 -07:00
Priority: 0 Unassigned
Vote count: 1
Last updated: 13.10.2014 3:56:13 -07:00
Planned for release:
Resolution:
Closed:
Attachments: WorkitemControl.png