Hi, Vit What software did you try to use to send the file to the plotter ? Some programs will ignore completely the handshake lines and not set them the right way. Try to use the DOS copy command and see if it does not work with the cables you have made. Best regards, Alexandre Guimaraes -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics