Base on my research, this is a know issue and many people encounter the same issue. You can try the solution provide by Karthik on the link below:
If the issue persists, you can submit a feedback at http://connect.microsoft.com/SQLServer/Feedback and hope it is resolved in the next release of service pack or product. Your feedback enables Microsoft to make software and services the best that they can be, Microsoft might consider to add this feature in the following release after official confirmation.
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- Marked as answer by Charlie LiaoMicrosoft contingent staff, Moderator Tuesday, October 15, 2013 3:42 PM