FTP Problems

Question

Hi All,

I'm building a service that regularly backs up a set of files via FTP, and am having some problems. I have a class (from: http://dotnetperls.com/recursively-find-files) that recursively builds a listing of the source directory and subdirectories. Then I upload using an FtpWebRequest. The upload works fine for the individual files in the root directory, but dies with a "550 - File Unavailable" error when it gets to the subdirectories.

I'm writing the path out to file as a means of debugging and it looks to be ok to me, so I'm not sure what's going on. My Ftp code follows. Thanks in advance.

 List<string> dirs = FileHelper.GetFilesRecursive(@"C:<source 
directory>");
foreach (string p in dirs)
{

StringBuilder builder 
= new StringBuilder(p);

//remove leading directory info and reverse 
slashes
builder.Remove(0, 38); 
builder.Replace('\\', 
'/');

FtpWebRequest request = 
(FtpWebRequest)WebRequest.Create("ftp://<server IP>" + 
builder);
//StringBuilder builder2 = new StringBuilder("ftp://<server 
IP>" + builder);
//writer.WriteLine(builder2);
request.Timeout = 
10000;
request.ReadWriteTimeout = 10000;
request.UseBinary = 
true;
request.KeepAlive = true;
request.Method = 
WebRequestMethods.Ftp.UploadFile;

FileInfo uploadFile = new 
FileInfo(p);
request.ContentLength = uploadFile.Length;
int buffLength = 
2048;
byte[] buff = new byte[buffLength];
int 
contLength;

FileStream fStream = uploadFile.OpenRead();

Stream 
requestWriter = request.GetRequestStream();
contLength = fStream.Read(buff, 
0, buffLength);

while (contLength != 0)
{
requestWriter.Write(buff, 
0, buffLength);
contLength = fStream.Read(buff, 0, 
buffLength);
}

requestWriter.Close();
fStream.Close();
}