I have a USB 2.0 WLAN Card (ASUS WL-167G), but my mb just support USB 1.1 only, and I am using XP system. Can I use this card in my computer? Sometimes it can (but slow), but most of time can't. Is this because of different USB standard? Beause, if I use USB 1.1 WLAN card, it's no problem at all.