The server principal "xyz" is not able to access the database "CMS" under the current security context. (Microsoft SQL Server, Error: 916)

Error:- 

TITLE: Microsoft SQL Server Management Studio
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Failed to retrieve data for this request. (Microsoft.SqlServer.Management.Sdk.Sfc)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&LinkId=20476

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ADDITIONAL INFORMATION:

An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)

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The server principal "nwisuser" is not able to access the database "CMS" under the current security context. (Microsoft SQL Server, Error: 916)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=10.00.2531&EvtSrc=MSSQLServer&EvtID=916&LinkId=20476

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BUTTONS:

OK

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Solution:-

1. Display "Object Explorer Details" (F7) or "View –> Object Explorer Details
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   CLICK on Databases in left Pane.Right click the column headers and deselect "collation"
2. 
   
   
   
   
   
   
   
   

DONE .... Refresh Databases and start working