Thanks for your quick reply.

I am using SQL server 2008 r2

more information:

Microsoft SQL Server Management Studio10.50.1600.1

Microsoft Analysis Services Client Tools10.50.1600.1

Microsoft Data Access Components (MDAC)6.1.7601.17514

Microsoft MSXML3.0 5.0 6.0

Microsoft Internet Explorer8.0.7601.17514

Microsoft .NET Framework2.0.50727.5420

Operating System6.1.7601