Granting Editor Permission to a User for Public Folder in Exchange 2007

Hi All

I have come across an issue while Granting Editor permission to a user for 2014 Public Folder, i tried giving permission using shell cmdlets

Get-PublicFolder –Identity “\Official Rent\Team\Lock-out\2014” –Recurse | Add-PublicFolderClientPermission –User "mno213" –AccessRights Editor

Command executed successfully but user still don't have access to the PF 2014. Any suggestions would be greatly appreciated.

Thanks