Balance pcc mikrotik problemaficando somente um link depois de um tempo

Olá pessoal sou novo aqui em em fóruns, ja realizei muitas coisas apenas lendo os tópicos mas estou com um problema que não consigo achar solução.
Tenho um uma rede que rece 3 links vdsl num ponto onde tenho uma rb450g fazendo balance, num outro ponto recebo este link com outra rb450g fazendo outro balance pois no segundo ponto tenho um link dedicado, e o server gerenciando a rede. oque acontece é que a segunda rb do balance fica rodando direitinho mas depois de algumas horas ela para de buscar no link do adsl (1º balance e fica somente no link dedicado. e não volta as vezes volta sozinho... mas tenho que reiniciar... oque pode ser?
Obrigado desde já!

segue imagem...Anexo 52468

Segue as regras:

Código :

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/ip firewall address-list
add address=187.72.154.0/24 comment=Combat_Arms disabled=no list=Sem_balance
add address=200.147.3.199 comment=Combat_Arms disabled=no list=Sem_balance
add address=200.229.60.0/24 comment=Combat_Arms disabled=no list=Sem_balance
add address=199.59.148.82 comment=Twiterr disabled=no list=Sem_balance
add address=199.16.156.198 comment=Twiterr disabled=no list=Sem_balance
/ip firewall connection tracking
set enabled=yes generic-timeout=10m icmp-timeout=10s tcp-close-timeout=10s \
    tcp-close-wait-timeout=10s tcp-established-timeout=1d \
    tcp-fin-wait-timeout=10s tcp-last-ack-timeout=10s \
    tcp-syn-received-timeout=5s tcp-syn-sent-timeout=5s tcp-syncookie=no \
    tcp-time-wait-timeout=10s udp-stream-timeout=3m udp-timeout=10s
/ip firewall mangle
add action=accept chain=prerouting comment="Fora Balance" disabled=no \
    dst-address-list=Sem_balance in-interface=LOCAL
add action=accept chain=prerouting comment=****************************** \
    disabled=no dst-address=10.0.0.0/24 src-address=10.0.0.0/24
add action=accept chain=prerouting disabled=no dst-address=186.249.1.0/29 \
    src-address=10.0.0.0/24
add action=accept chain=prerouting disabled=no dst-address=192.168.12.0/24 \
    src-address=10.0.0.0/24
add action=accept chain=prerouting disabled=no dst-address=192.168.25.0/24 \
    src-address=192.168.12.0/24
add action=mark-connection chain=prerouting comment=\
    *************************** connection-mark=no-mark disabled=no \
    in-interface=ISP1 new-connection-mark=ISP1_CON passthrough=yes
add action=mark-connection chain=prerouting connection-mark=no-mark disabled=\
    no in-interface=ISP2 new-connection-mark=ISP2_CON passthrough=yes
add action=mark-connection chain=prerouting connection-mark=no-mark disabled=\
    yes in-interface=pppoe-out3 new-connection-mark=ISP3_CON passthrough=yes
add action=jump chain=prerouting comment=********************* \
    connection-mark=no-mark disabled=no in-interface=LOCAL jump-target=\
    POLICE_ROUTER
add action=mark-routing chain=prerouting comment=******************** \
    connection-mark=ISP1_CON disabled=no new-routing-mark=ISP1_TRAFIC \
    passthrough=yes src-address=10.0.0.0/24
add action=mark-routing chain=prerouting connection-mark=ISP2_CON disabled=no \
    new-routing-mark=ISP2_TRAFIC passthrough=yes src-address=10.0.0.0/24
add action=mark-routing chain=prerouting connection-mark=ISP3_CON disabled=\
    yes new-routing-mark=ISP3_TRAFIC passthrough=yes src-address=\
    192.168.12.0/24
add action=mark-routing chain=output comment=********************** \
    connection-mark=ISP1_CON disabled=no new-routing-mark=ISP1_TRAFIC \
    passthrough=yes
add action=mark-routing chain=output connection-mark=ISP2_CON disabled=no \
    new-routing-mark=ISP2_TRAFIC passthrough=yes
add action=mark-routing chain=output connection-mark=ISP3_CON disabled=yes \
    new-routing-mark=ISP3_TRAFIC passthrough=yes
add action=mark-connection chain=POLICE_ROUTER comment=\
    ************************** disabled=no dst-address-type=!local \
    new-connection-mark=ISP2_CON passthrough=yes per-connection-classifier=\
    both-addresses:5/0
add action=mark-connection chain=POLICE_ROUTER disabled=no dst-address-type=\
    !local new-connection-mark=ISP1_CON passthrough=yes \
    per-connection-classifier=both-addresses:5/1
add action=mark-connection chain=POLICE_ROUTER disabled=no dst-address-type=\
    !local new-connection-mark=ISP2_CON passthrough=yes \
    per-connection-classifier=both-addresses:5/2
add action=mark-connection chain=POLICE_ROUTER disabled=no dst-address-type=\
    !local new-connection-mark=ISP2_CON passthrough=yes \
    per-connection-classifier=both-addresses:5/3
add action=mark-connection chain=POLICE_ROUTER disabled=no dst-address-type=\
    !local new-connection-mark=ISP2_CON passthrough=yes \
    per-connection-classifier=both-addresses:5/4
/ip firewall nat
add action=masquerade chain=srcnat disabled=no out-interface=ISP1
add action=masquerade chain=srcnat disabled=no out-interface=ISP2
add action=masquerade chain=srcnat disabled=yes out-interface=pppoe-out3
/ip firewall service-port
set ftp disabled=no ports=21
set tftp disabled=no ports=69
set irc disabled=yes ports=6667
set h323 disabled=yes
set sip disabled=yes ports=5060,5061 sip-direct-media=yes
set pptp disabled=yes

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