i do 2 wan load balancing after load balancing inter net is very slow for all client i haier 2 mikrotik consultent for check problem but any consultent cant not mind my problem any body can help me
You need to include your configuration export, or else nobody will be able to tell you what is wrong with it.
(of course showing it will not guarantee that anybody will debug it because such configs can be very specific and quite complex)
My first guess would be that there is something wrong with the policy routing that forces packets out via the connection where they were initially established.