We need a FAQ section on the first page of this thread for the common issues that arise. Or simply a format of questions that get answered so we have a good idea of the system rather than it doesnt work, whats wrong?.
Maybe something along the lines of:-
1). What OS are you using? Windows,Linux variant?
2). What version of cgminer are you running? Vhs or standard?
3). What usb hub is being used?
4). Is the hub mains powered? If so what is the power/amperage rating?
5). How have you connected the hub? Usb2 or 3 port?
6). What is the specific problem you are having?
Just an idea. May help speed up the diagnosis of problems.
Don forget to mention the ./cgminer it has been several times now (inclusing myselve), this came along.