We are using you trial verison 4.7a to attempt to drip feed out yasnac mx-1/matsuura 500v. we can send & recieve programs without issue. when attempting to drip feed (using tape mode) the mx-1 recieves and executes the 1st few lines the throws a rs2323c overun error. we disabled fifo and are using xon/xoff with a 200 delay and block space any Ideas?