To add folder in server thru' browser

[piyush]

i m trying to create a folder in the web server thru browser. i have
used a text box and a button in text box user wud give the name of
folder. i m tracking the path bystrPath =
Server.mapPath(Request.ApllicationPath) + "\\" + txtFolder.txt. and ten
trying to create a folder by Directory.CreateDirectory(strPath) but i m
getting an error : System.UnauthorizedAccessException: Access to the
path "d:\inetpub\wwwroot\piyush0604\piyush" is denied
help me out,
bye ,
piyush