I have never had a problem with the DWL-650 cards, and I have 3 of these. Also have a Netgear and a Billiton card or whatever. All are 802.11b and easily handle the d/l rates encountered in normal home/cafe/hotel use. One older laptop don’t like the DWL-650's with other cards at the same time in the PCMCIA slots. Dlink changes chipsets at the drop of a hat. You might return it and get another one. The last one I bought was $12.
MisterNice