Can't find reference to an Armada 3760 on the web, but there's a 7360 - which seems to support Cardbus.
You must first check that the laptop PCMCIA slot supports Cardbus. It should mention Cardbus in Device Manager if it supports it.
What OS do you use? You must have 98 second edition or later in order to use USB2. Doesn't the card come with drivers for your OS?