Failed association and WDS

Hi everyone,
I have deployed a mikrotik WISP with RB532 as the base on 150’ mast with 3 sectorial antennas 120 degrees, RB532 has three Atheros wireless cards, recently I have been having problems with inability to add more clients to each sector, I have a feeling because I have not configured each wireless card as ap/bridge.
I want to know if the number of clients an ap/bidge can take?
I am using 2.4Ghz, 802.11b/g and my client stations are RB112 running router0s version 2.9.35

“Feelings” can get hurt, jrtm. :confused: