Connection error to WebService when chunkSize is to small

[djp]

Hi
I have a weird situation which i don't understand.
I have simple WebService that sends file to Client.

When i set chunk size to 16 kB file is received without any exceptions...
However when i set it to 1kB i get random exceptions ( cannot connect to
webservice ).
As a result i cannot download whole file. What i can download is about half
of the file ( 18MB ) with moreless 10 exceptions.
When i catch exception, then program tries to connect again - this usually
helps.
However after some number of exceptions the reconnect is not working
anymore. Always cannot connect to Webservice.
Why is is so? Is it because i cannot connect to webservice with such a high
rate?? If so ... why??
Here is the simple code of my DownloadWorker

private void downloadWorker_ DoWork(object sender, DoWorkEventArgs e)

{

using (FileStream fs = new
FileStream("tes t",FileMode.Cre ate,FileAccess. Write))

{

while (Offset < FileSize && !downloadWorker .CancellationPe nding

{

try

{

byte[] Buffer = myObj.DownloadC hunk(this.FileN ame, this.Offset, 16*1024);

fs.Write(Buffer , 0, Buffer.Length);

this.Offset += Buffer.Length; // save the offset position for resume

}

catch (Exception ex)

{

//MessageBox.Show (ex.Message);

//throw new Exception("Erro r occurred during upload, too many retries.\r\n"
+ ex.Message);

}
// update the user interface by reporting progress.

downloadWorker. ReportProgress( (int)(((decimal )Offset / (decimal)FileSi ze) *
100));

}

}

}

thanks for any suggestions

PK