PROT P enabled doesnt transfer file over FTP

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I have the below code to upload a file to FTP which has security enabled along with PROT P

FtpWebRequest fwr = (FtpWebRequest)FtpWebRequest.Create("ftp://mysite" + nameOfFile);
fwr.Credentials = new System.Net.NetworkCredential(username, password);
fwr.Method = System.Net.WebRequestMethods.Ftp.UploadFile;
fwr.UseBinary = true;
fwr.KeepAlive = true;
fwr.EnableSsl = true;
ServicePointManager.ServerCertificateValidationCallback = (s, certificate, chain, sslPolicyErrors) => true;

System.IO.FileInfo fi = new System.IO.FileInfo(filePath);
fwr.ContentLength = fi.Length;
byte[] buffer = new byte[4097];
int bytes = 0;
int total_bytes = (int)fi.Length;

try
{
System.IO.FileStream fs = fi.OpenRead();
System.IO.Stream rs = fwr.GetRequestStream();

while (total_bytes > 0)
{
bytes = fs.Read(buffer, 0, buffer.Length);
rs.Write(buffer, 0, bytes);
total_bytes = total_bytes - bytes;
}

fs.Close();
rs.Close();
FtpWebResponse uploadResponse = (FtpWebResponse)fwr.GetResponse();
var value = uploadResponse.StatusDescription;
uploadResponse.Close();

I use ftp:// as using any other protocol i.e. ftpes throws an error.

For some reason if PROT P is disabled on the receiving end the file is transferred successfully otherwise its not. No error messages are thrown.

Is there something im missing?

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