[DotNetDevelopment] The remote server returned an error: (550) File unavailable (e.g., file not found, no access).

[Priyanka]

i m reading some data frm system to upload Ftp Server ..
nd using ASP.NEt &C#

FileStream fs = fileInf.OpenRead();
        Stream strm = reqFTP.GetRequestStream();
        contentLen = fs.Read(buff, 0, buffLength);
        while (contentLen != 0)
        {
            strm.Write(buff, 0, contentLen);
            contentLen = fs.Read(buff, 0, buffLength);
        }
        strm.Close();
        fs.Close();

it gives error: System.Net.WebException: The remote server returned an
error: (550) File unavailable (e.g., file not found, no access).
i dont understand where d prob actally is??