Thanks for the quick reply, tried it, didnt work. GPPW loads and runs perfectly, just no comms with the CPU. When plugging in windows see's it but wont load the driver, keeps on asking for FX3U-US-BD, searched the net, Mitsi website, cant find it. It has been a while since I last used a FX3, so probably missing something silly. Also tried it on a XP laptop, exactly the same, not getting help from Mitsi. All that is that folder is ECUsbd.inf and ECUsbd.sys.