Issues while updating values in Multivalue Custom Control

Hello, While updating values in the "MultiValue" custom control I am facing issues. Each time despite of the fact that the WIT file is opened from Server I still see the old values which were either deleted or changed. I have even tried un-installing and re-install TFS power tools and removed WIT files from local computer's cache within VS directory under Program Files. Appreciate a early response for resolution. Thanks! Arshad