File Transfer negotiates stream but progress remains at 1.0

am new to smack and openfire and i was recently trying to send a file from one pc to another but each time progress doesnt proceed beyond 1.0 on the sending side and 0.0 on the receiving side. i was using the example in the file transfer extension documentation:

http://www.igniterealtime.org/builds/smack/docs/latest/documentation/extensions/

// Create the file transfer manager

      FileTransferManager manager = new FileTransferManager(connection);

      // Create the outgoing file transfer

      OutgoingFileTransfer transfer = manager.createOutgoingFileTransfer("romeo@montague.net");

      // Send the file

      transfer.sendFile(new File("shakespeare_complete_works.txt"), "You won't believe this!");

but i cant seem to transfer the file, its a simple text file. please somebody help, i have read through most of the discussions concering file transfer in this community but non of them solves the problem