How to delete file from server which has hosted live using ftp

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ASP.NET

Hi,

I am unable to get correct file path to delete a file from the server.
I am able to delete the file when i run my code in localhost also am able to delete file and i change the connection string to live connection string .

I want to delete a file which has been hosted live in server using ftp .using asp.net code
The file has delete permission.

The code for deleting

try
{

    FileInfo TheFile = new FileInfo(Server.MapPath(TextBox2.Text));



    if (TheFile.Exists)
    {
        File.Delete(Server.MapPath(TextBox2.Text));
        Response.Write("success");
    }
    else
    {
        throw new FileNotFoundException();
    }
}

catch (FileNotFoundException ex)
{
    //  lblStatus.Text += ex.Message;
    Response.Write("              ");
    Response.Write(ex.Message);
}
catch (Exception ex)
{
    Response.Write("         ");
    Response.Write(ex.Message);
}