AFM SSH Proxy configure

hi, I am trying to create a SSH proxy on my F5.

so I created VS listening to port 22 (ssh) and assigned the real SSH server to him (pool) - this is working good the next step was to activated the AFM module and configured SSH-PROXY profile through SECURITY -- PROTOCOL SECURITY -- SECURITY PROFILE -- SSH PROXY and to assign this profile to the VS...

now its not working... I tried this manual : https://support.f5.com/kb/en-us/products/big-ip-afm/manuals/product/network-firewall-policies-implementations-12-1-0/13.print.html

what do I missing?? help please....