No received packets

My laptop B is able to connect to my Wireless Router but can't receive any
packets. It says "Status:Connected", "Signal Strength: Excellent", but the
Status shows that the number of Received packets are zero. Any ideas? I am
able to connect to the same router and access internet using Desktop A and
Laptop B. The only difference is I am using a differnt router card (orinoco
gold) with this Laptop.

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