Actually I was using .net utility api. And there was an error .Now I
have placed a form on my ASPX page.There is another ",form>" tag on
this page with "runat="server" " attribute required for
asp.net pages.
Anyhow the other form tag is used to upload file.Here there is a
upload file control and it works fine for 2007 presentations as well.
So my problem has been solved.thank you..
Regards
Ulfat Hussain