Welcome to the HE community sorry you started here with troubles, but we'll get you back on track.
I've seen it posted that some hubs have had issue with auto negotiate. In the post below they got it working by manually setting the port to 100FDX.
Once you can talk to the hub you can see this post for a link to disable auto neg off. Once off you can change you port back, and have everything play nice. There might even be a firmware fix for it once you get it running. I'm not 100% sure being that my C7 is still in the box.
Let us know if that gets you going or not.
