Uploading of file is not working.

[Nurendra Choudhary]

Hi,
My db.py is:

 Field('Research_Statement','upload'),
                Field('Teaching_Statement','upload'),
                Field('Relevant_Research_Paper_1','upload'),
                Field('Relevant_Research_Paper_2','upload'),
                Field('Relevant_Research_Paper_3','upload'),
                Field('Recommendation_Name_1','string'),
                Field('Recommendation_Email_1','string'),
                Field('Recommendation_Name_2','string'),

I use this table to create normal SQLFORM by using form=SQLFORM(db.table_name).
The problem is that I am able to browse and fill the field and the form also passes without any error 
but the file is not uploaded to the database. All the other fields are updated.