diff --git a/src/wp/FileTransfer.cs b/src/wp/FileTransfer.cs
index f8b6ed5..6b18931 100644
--- a/src/wp/FileTransfer.cs
+++ b/src/wp/FileTransfer.cs
@@ -765,6 +765,8 @@ namespace WPCordovaClassLib.Cordova.Commands
 
                             byte[] buffer = new byte[4096];
                             int bytesRead = 0;
+                            //sent bytes needs to be reseted before new upload
+                            bytesSent = 0;
                             totalBytesToSend = fileStream.Length;
 
                             requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);