Writing a text file on the location specified by the user (Published Application)

Hi Experts,
      I want to create an asp.net application which allow user to specify text file path and create a text file on the specified location by doing some processing from the sql server database.

for specifying path of the txt file i am using setting.xml
setting.xml
<TextFilePath> "D:\Text" <\TextFilePath>  //as specified by the user.




The code is working fine if it is not published

Once the application is uploaded on the server(published) and run under the virtual directory. it is not working

please help....



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