loosing connection

Am new to wireless networks at list in large scales. i had only being working on indoors for a while. i just got a mikrotik box software verion 2.8.28 with a 15dbi omni and i have 3 clients 2 indoor dlinks and a senao 14dbi panel outdoor radio.
i wasnt expecting to have much problems but i am. i noticed that the indoor equipments used to disconnect and reconnect alot, when i check the log it was wlan1:lostnode,excessive data retries . and the mac belongs to the indoors. this happens quite often but as for the outdoor equipment it doesnt give erors when it disconnects the reply time of a ping just increases and atimes even disconnects. so right now everything is unstable.

Please i would like someone to please help me out here. i dont even mind if the person could guide me in configuring the mikrotik.

Try these…

http://forum.mikrotik.com/t/problems-with-mikrotik-base-station-5-ghz/2601/1

http://forum.mikrotik.com/t/mikrotik-router-and-dlink-router-with-connection-problems/1684/1

http://forum.mikrotik.com/t/why-do-i-get-this-message/1949/1