Port forwarding MT by DDNS

Hello all,
Please I’m face on a problem.

I dont have public IP so I use MT cloud DDNS (xxxxxxxxxxxx.sn.mynetname.net) to remote my LOCAL MT. All was working very nice.

I’m doing hotspot on my MT RB2011, and want to do Load Balancing (ppp client & pppoe client) on another MT router (RB951) upstream.

But after configurate Load balance WAN1 – ether1 ; WAN2 – ether2 ; LAN – ether3 === load balancing config work well

My MT RB2011 get internet his port 1 (ether1), ip-cloud == is active

PROBLEM == I can’t now remote my RB2011 using his DDNS (xxxxxxxxxxxx.sn.mynetname.net) LIKE BEFORE Load Balance config.

When try to get remote access to my MT RB2011, ==== it GOES to RB951.

When I put RB2011 DDNS ==== IT GO TO RB951

NB: RB951 DDNS WAS unable.

So please help me !! How to get remote access to my RB2011 by is DDNS address. ?

Which config (NAT) or whatever should I do ?

TKS