Wi-Fi connection with osx 10.8

1. After installed the Apple Osx 10.8, every things alright, but except the network card, I have on board network card, and a RT8139 network card, also a edimax ew-7711umn wireless USB, but nothing can be found in OSX, 2. Then I download the edimax USB wi-fi driver from here,
then installed to OSX, after some tuning,
I config the ip address and router address manually, then worked fine.
‧Support > By Products > Wireless Range Extenders / Access Points / Bridges > EW-7711UMn
but I want RT8139 working back.