problems with trnenet 510apb

Hi, i need help with this:
i have mikrotik with 2 minipci cardds, one senao nmp8602 in 2.4ghz andCM9 card in 5ghz with WrapBoard, the clients have AP trendware tew-510apb (chipset atheros) and it does´nt connect, when it conect router says -95 signal but never passs pings.

i had proved some APs and proved the senao 8602 card in 5ghz too and the same .

the Ap conected to anothes 510apb works great, but conected to mikrotik not.

Any body can help me ?