On 2013-11-16 13:37, Marty Hartwell wrote: > You probably need the correct driver, not sure how you do that though. If the issue is a counterfeit Prolific chip, the older driver that doesn't test for this and further instructions can be found at http://www.miklor.com/COM/UV_Drivers.php Worked a treat for me. Benton 16nov13 -- KF7QLP Benton Holzwarth benton at siletzbay.com