I have configured ECMP load balancing with masquerade everything work fine but after 10 min messenger voice chat disconnect but messenger still signin and after 1hour to 1:30hour browsing stopped.
i read this post
http://forum.mikrotik.com//viewtopic.php?f=2&t=30920
in this post normis says
you have fully routed network (clients address can be routed via all available gateway), change of the gateway will have no ill effect.
plz anybody tell me how to fully route network
how to create static DNS entry and policy route that traffic to specific gateway.
plz help me
Thanks in advance
Sorry for bad english
plz explain how to fully route network 
It means that all clients have public IP addresses and masquerade is not used.
if i disable the masquerade then clients cannot access to the internet.
can u give me the working guide or wiki of ECMP LB without masquerade.
Your clients cannot access internet with disabled masquerading because they have private IP addresses :
http://en.wikipedia.org/wiki/Private_network
As I mentioned earlier, clients need public IP addresses if you don’t want to use masquerade.
Thanks mrz for quick reply
thx thx thx 
I have changed my ECMP config to NTH load balancing with masquerade