what can i set to prevent deauth?

Hi my rb logs keeps on saying the following.
00:1B:77:61:2F:D6@EMI1 : Disconnected,recieved deauth, unspecified(1)

Can i set something to prevent it? Thanx

The other side of the link may indicate more precisiely why it sent deauth.

It is saying that same. Is only happens when im trasfering large file or surf the net. SOmetime i may get exensive data loss error aswell.

enable Debug logs on both sides, and then see this for clarification of errors:
http://wiki.mikrotik.com/wiki/Wireless_Debug_Logs