dwl 520 & AP900+

[Road]

hello

i have problem whith dwl 520 and AP 900+

i make this link 


  box ---- eth0 ------- dwl520  ---- wifi link--- ap900+ ------ box
(slack) (192.168.6.1)  (mode ap)                               (win)
                     (192.168.8.254)                      (192.168.8.2)


and i can`t ping server at windows...i change ip and gw any time and any 
possible but i can`t ping this computers....i can ping ap900+ 

how make this connection at dwl520 and ap900+


regards

ps sorry for my english :)