FAILOVER 10MINUTES ROUTES PROBLEMS

I MADE THIS SETUP TO MAKE LOAD BALANCING TWO WAN CONNECTION
THE PROBLEM IS THAT EVERY 10 MINUTE OR SO CONNECTION to the router FROM OUTSIDE GET impossible it come back in business about 3-5 minute later

do somebody have any hint how to resolve this?

part of my route config
C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme,
B - blackhole, U - unreachable, P - prohibit

DST-ADDRESS PREF-SRC GATEWAY DISTANCE

0 A S 0.0.0.0/0 xxx.237.44.65 1
xxx.237.44.65
xxx.237.44.65
xxx.237.44.65
xxx.237.44.65
xxx.122.232.1

[admin@MikroTik] /ip firewall nat> print
Flags: X - disabled, I - invalid, D - dynamic
chain=srcnat action=masquerade out-interface=cogeco
chain=srcnat action=masquerade out-interface=cogeco2

as you can see ive tryed to put some sort of balancing ratio to use the big connection.

You have to set up PCC, here you can find example:
http://wiki.mikrotik.com/wiki/Manual:PCC