I have tried all recommended cable and parameter settings. I can receive files from the control but when I try to send it reads the filename and responds with tape filename ="Whatever name I have put in the file" then on the next line states "var id information reading" then after the timeout period is up it responds with timeout error 2134. It obviously is wired right because it reads the filename. What is making it stop at that point? Does anyone know? Is there a manual with specific low level RS232 protocols on this control?