The USB ethernet adapter for the macbook air is not working. Cable unplugged. How can I fix this for the recent patch 10.7.2?

I have recently purchased an ethernet usb adapter for the MBA and after a month it is not working. Says cable unplugged.
Now I have tried it with 2 other connections on other computers that are working and still no response. Many reviews or fixes online mention something with a 10.5.5 patch that seems quite outdated and do not work. Anyone figure out how to fix this or do I have a broken adapter?

I've used Apple's adaptor on a mini MBA without a problem.

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