F5 not routiing traffic through floating IP

This is my vs config . I have the Servers , F5 in the same subnet and the have static route on the F5 for all 192.x.x.x network --- DFG to be the firewall

ltm virtual /Common/smtp_vip { description smtp destination /Common/192.10.1.20:25 ip-protocol tcp mask 255.255.255.255 pool /Common/smtp_pool profiles { /Common/tcp { } } rules { /Common/smtp_irule } source 0.0.0.0/0 translate-address enabled translate-port disabled

ltm profile fastl4 /Common/forwading_fastl4 { app-service none defaults-from /Common/fastL4 hardware-syn-cookie enabled idle-timeout 300 ip-tos-to-client pass-through ip-tos-to-server pass-through keep-alive-interval disabled late-binding disabled link-qos-to-client pass-through link-qos-to-server pass-through loose-close enabled loose-initialization enabled mss-override 0 pva-dynamic-client-packets 1 pva-dynamic-server-packets 0 pva-offload-dynamic enabled reassemble-fragments disabled reset-on-timeout enabled rtt-from-client disabled rtt-from-server disabled server-sack disabled server-timestamp disabled software-syn-cookie disabled syn-cookie-whitelist disabled tcp-close-timeout 5 tcp-generate-isn disabled tcp-handshake-timeout 5 tcp-strip-sack disabled tcp-timestamp-mode preserve tcp-wscale-mode preserve }

ltm rule /Common/smtp_irule { when LB_SELECTED {

if {[IP::addr "[IP::client_addr]/24" equals "[LB::server addr]/24"]} {

  snat automap 

} } } ltm pool /Common/smtp_pool { description p1 members { /Common/p1:0 { address 192.10.1.25 } /Common/p2:0 { address 192.10.1.25 session user-disabled } } monitor /Common/SMTP-DLP