Got the new unit today, apparently it is a Chinese knockoff (http://imall.iteadstudio.com/im120411003.html). Still getting the same error. As with the last one, when I do the loopback all I get are squares back. I've tried both versions of drivers, so I'm pretty sure those are right. Holding reset doesn't help. Any other ideas before I just return it and get one from another store?