"Unable to process one or more commands" error message

Hi ,

I am getting error while trying to implement dynamic dimension security.

The error reads as follows:

Unable to process one or more commands.
User-generated error - the dimension "<Dimension Name>" has no valid member. For more information, see your administrator.
This error occurs when we try to test the role in Analysis Services 2000/sp4. on a windows 2003 server.
but NO USE. The error remains the same.
The following is the MDX query I am using :

Filter([Division].[Iclas].Members,(StrtoTuple("[User].[" +Username +"]"), [Measures].[Sales]) = 1)

Please Help.

[1357 byte] By [BhanuKiran.K] at [2007-12-24]

SQL Server

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