Make sure that file and printer sharing is on (for the new computer) and that the Network and Remote Procedure services are set to automatic (start >> run >> services.msc) Also, make sure that the hard drive is shareable or has at least one shared folder. Of course, double check on the ethernet (or usb, or serial) cable being connected properly. Check to see if a firewall is blocking the connection. And if that's all set properly, then set up an new network on the new computer so it can link to the hub
Happiness is not about being perfect.
It is about seeing beyond the imperfections.