Can Fulltexttable search of containstable search for filestream in sql server 2008 works?

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I am using filestream feature of sql server 2008 to store files.
I need search functionality to search in that files so i am using
freetexttable search to retrieve search results with hits for search keyword.
But when i searching keyword "at&t" that doesn't gives me desired result.
I know that i have keyword "at&t" in my some of files.
I am also trying to retrieve sql server 2008 index keywords list on my filestream
feature table. That table list all keyword which was index from my files.
That also doesn't list out "at&t". So my question is how can i get "at&t" as key word on filestream index table.