2 wan and two lan network route ip address

hello cant route external ip address to local ip add network map
not work route to internal ip
**.90.75.121 not accessible

I AM USING MIKROTIK RB1100AHX2

ISP 1 FOR SERVER AND BACKUP INTERNET FOR CLIENTS (ETH1)
ADDRESS **.90.124.28
GW **.90.124.1
additional routed address
**.90.75.120/29
**.90.75.121 routed to 1.2.1.13
**.90.75.122
**.90.75.123
**.90.75.124
**.90.75.125
**.90.75.126

ISP 2 THIS ISP FOR CLIENTS (ETH2)
88.223.78.** DHCP CLIENT
GW 88.223.78.252

SERVERS NETWORK 1.2.1.254 (ETH3) THIS NETWORK USING ISP 1 using prerouting to eth1 (isp1)

(SERVER 1)
ADDRESS 1.2.1.13 ADD additional **.90.75.121
GW 1.2.1.254

(SERVER 2)
ADDRESS 1.2.1.14 ADD additional **.90.75.123
GW 1.2.1.254

CLIENTS NETWORK 1.1.1.254 (ETH4) DHCP SERVER THIS NERWORK USING ISP 2 AND (ISP 1 FAILOVER)
CLIENT 1 DHCP CLIENT
CLIENT 2 DHCP CLIENT
CLIENT 3 DHCP CLIENT