It would help if you mention what Linux distribution you are using.
If you're in a hurry, first thing you can do is to Google everything I could find about Linux support for that network card. Write the manufacturer to ask what they know about the level of support, and complain if they aren't supporting it at all.
If you want to directly test whether your hardware is supported, I would suggest booting with a live CD and seeing whether it detects your hardware. For example:
This has excellent hardware detection, so if your hardware works on that the problem probably lies with compatibility with whatever distro you are using.
Once you figure that out, you might consider posting specific compatibility questions in the relevant Linux forum (Debian, Fedora, Slackware, etc.).