BT already has drivers that support that card built-in. If you install the ubiquiti drivers, it will may overwrite the modules already included.
To build and install the ubiquiti drivers run make in the ubnt directory, then cd into src/madwifi-dfs-* and run make install.
I haven't tried these. The SRC isn't listed as a supported card and I haven't bought any ubiquiti mini-pci cards yet.
I'd be interested in how they work for you. Injection, monitor mode, reported txpower, stuff like that if the drivers recognize your card.Driver Compatibility: SR2, SR5, SR4, SR9, XR2, XR3, XR4, XR5, XR7, XR9