I am getting bad readings from an ultimeter 2100 (wind speed 200mph etc.) for display and transmission on xastir. I am using xastir 2.0.0, ultimeter 2100, prolific 2303 USB serial port. Port settings are 2400 8N1 ASCII. I have changed the port and rebooted the ultimeter without success. It worked for a while but not now. Any help would be appreciated.