Hi It's just a generic one from eBay here is an image, I replaced the one I modified with another of the same I set the IP address as static and changed the IP address in the Pluto Config file to match and so far it seems ok,
Thanks again to everyone for the help
maybe I missed it but have you tried any other USB-Ethernet adapter? Does the Pluto work when directly connected to a Laptop with USB? I think some ethernet adapters give more problems than others, can you post a picture or model of your adapter?