AP-bridge cannot connect to another AP-bridge with default settings, connection between AP is possible with enabled WDS. If you have WDS enabled between AP to secure connection:
1) Disable 'default-authentication' and add WDS peers MAC-address to 'connect-list' (! not to access-list).
2) Enable encryption WPA or WPA2 between wireless interfaces.
ofcourse, with WDS...and LOS
maybe next 17 days i will make new link AP-AP around 6,3km
Thanks for you experince, when you have other experince don't forget me for your advice...