Its probably not a chipset that is supported by the default Mandrake kernel. Don't worry though, there's 3rd party drivers for everything these days... and when those fail, there's ndiswrapper. Prepare to get your hands dirty though.
Okay, according to the list of all that is holy:
http://www.linux-wlan.org/docs/wlan_adapters.html.gz
This is an Orinoco card!?!?!
Wacky!
If this is true you have the most uber-supported card out there...
Open up a Konsole, Eterm, xterm, whatever, and become root:
su -
Then type the following command:
/sbin/cardctl ident
And post back with what you've got.
Cheers,
Finegan