Server connection failure when running ItemFinder sample

I am new to Full text serach.

Thought of trying the sample ItemFinder application (C#.NET) from the following link:

http://msdn2.microsoft.com/en-us/library/ms160844.aspx

But when I run the ItemFinder.exe,

I get the following error :

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Server connection failure
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Cannot open database requested in login 'AdventureWorks'. Login fails.

Login failed for user 'ASIAPACIFIC\muthubha'.
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OK  
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Any idea what is the problem and how to solve it?