RB411 /w WLM54G card Wi-Fi AP client no bandwith problem

Hello, I have an ancient router laying by me so i wanted to give it some life by installing LEDE. I installed latest version (17.01.4) with luci and driver for my WLM54G card (atheros5k). I am trying to bridge the connection form WLAN to LAN but I am struggling with Wi-Fi transfer rate. I can't get it to receive data. - RX rate is 0 for some reason. (Yes, I have external antenna connected and signal is OK).
Screenshot: https://i.imgur.com/Dx2WSGA.png