Property IsLocked is not available for Login '[x]'. This property may not exist for this object, or may not be retrievable due to insufficient access

One of my colleague has been getting following error when trying to open few logins properties to change their default databases using SSMS. TITLE: Microsoft SQL Server Management Studio ------------------------------ Cannot show requested dialog. ------------------------------ ADDITIONAL INFORMATION: Cannot show requested dialog. (SqlMgmt) ------------------------------ Property IsLocked is not available for Login '[X]'. This property may not exist for this object, or may not be retrievable due...(<a href="http://sqlserver-qa.net/blogs/tools/archive/2007/08/22/property-islocked-is-not-available-for-login-x-this-property-may-not-exist-for-this-object-or-may-not-be-retrievable-due-to-insufficient-access-rights-microsoft-sqlserver-smo.aspx">read more</a>)<img src="http://sqlserver-qa.net/aggbug.aspx?PostID=1655" width="1" height="1">