Help a newb

Hello.

I am running ethereal on a Xp SP 2 machine with a Belkin wireless  
card, I have a Wireless access point connected to my Adsl Modem/ 
Router.  There is also a laptop in the house that connects via the  
Access Point for the internet and MSN chat etc,etc.

I Can never capture anything that is being sent to or from the  
laptop. I have turned off promiscuous mode but still cannot capture  
anything from this laptop, I have also ran Ethereal with promiscuous  
turned on but I get nothing.

Can anyone point me in the right direction on how to capture packets  
from the laptop ?

Thank You