Retrieving the COM class factory for component with CLSID {00020906-0000-0000-C000-000000000046} failed due to the following error: 80070005

i am tring to read the word document from my local drive  in my visual web part(. by using this link http://stackoverflow.com/questions/15065053/read-a-word-document-using-c-sharp) once i deploy my solution  at the time of adding my web to page i am getting this excepitipn i tried this below likn

http://social.msdn.microsoft.com/Forums/en-US/netfxbcl/thread/b401459a-d14a-4517-b204-fe7c0f5b1f83

but still i am getting this exception

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Srinivas