promblem with Groove AP Groove A52HPN

Hi, i need help with 3 Groove A52HPN setting topology network like this INTERNET >>>RB2011ILIN >> 3 AP Groove which setting as ap bridge each connected to anntena sectoral waveguide 19dbi . the problem is cannot connect to the ssid even if can connect not to long and will break again for the signal is very full.

please advice
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