If you are using VectorLinux 5.8 or above, if your card does have native support then the module will be loaded automaticaly. VectorLinux 5.8 uses ifplugd to monitor network interfaces and try and connect to the ones it was assigned to.
You may want to add wlan0 (or whatever network interface you assigned to your card) to ifplugd. Open /etc/ifplug.d/ifplugd.conf with you editor and find the line that looks like this:
Add your network interface to that line, so it should look like this:
When a new interface has been added to ifplugd then it must be restarted. You can restart ifplugd with the following command:
service ifplugd restart