Object reference error by file upload control

Hi friends
 I am developing my project in asp.net2.0 and c#.I need to upload files and to do that I used fileupload control.But when I am accessing the fileupload control I am getting Object reference error.I tried with replace new controls and also changed namespace.


 But it did not resolved the problem.
Please help me..



With Regards
Shashi..

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