Hello Sanjeet,
   In your code the header and footer column is unmatched . Just care full 
about the Grid Structure as per Column name and data value. A part from 
that in refer
http://www.web2py.com/book/default/chapter/10#Low-level-API-and-other-recipes
 http://www.geraldoreports.org/docs/tutorial-web2py.html
http://code.google.com/p/pyfpdf/  

I

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