Is There A Size Restriction In Response.OutputStream

I'm using the technic described in: [URL]

to allow users to download files. Our group uses a tool called SecureGateway which doesn't seem to like FTP as a protocol.

Smaller files don't seem to have a problem, but intermittently larger files (larger than 10K) will not download to the client properly. They will just abruptly end the transfer as if they are actually completed.

I use the following code:

{
System.IO.
Stream iStream =
null;// Buffer to read 10K bytes in chunk:
byte[] buffer =
new
Byte[10000];// Length of the file:
int length;// Total bytes to read:
// string filepath = "DownloadFileName";
long dataToRead;// Identify the file to download including its path.
String filepath = Request.Params["file"].ToString();//
Identify the file name.
string filename = System.IO.Path.GetFileName(filepath);
try
{
// Open the file.
iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open,FileAccess.Read,
System.IO.FileShare.Read);
// Total bytes to read:
dataToRead = iStream.Length;
Response.ContentType = Response.AddHeader("application/octet-stream";"Content-Disposition",
"attachment; filename="" + filename +
""");
// Read the bytes.
while (dataToRead > 0)
{ // Verify that the client is connected.
if (Response.IsClientConnected)// Read the data in buffer.
{
length = iStream.Read(buffer, 0, 10000);
// Write the data to the current output stream.
Response.OutputStream.Write(buffer, 0, length);
// Flush the data to the HTML output.
Response.Flush();
buffer = new
Byte[10000];
dataToRead = dataToRead - length;
}
else
{
//prevent infinite loop if user disconnects
dataToRead = -1;
}
}
}
{
catch (Exception ex)// Trap the error, if any.
{
Response.Write("Error : " + ex.Message);
}
finally
{
if (iStream !=
null)//Close the file.
iStream.Close();
}
}
}

I know that there is a preset size restriction that you have to override when uploading a file to the server, just wondering if someone knows of a similar issue with downloading to the client.