Also, make sure you take a look at the 'Edit MAC Filter Setting' list for wireless cards. The reason is Linksys kind of did this backwords, where you type in the MAC addresses of the cards, and then there is a filter option right beside the MAC. If you enable the 'Station MAC filter' setting, and you want to allow speceic cards to associate, add their MAC addresses into the 'Edit MAC Filter Setting' list, but not check the box under 'Filter'