Unable to Access Site B applications when Connected to Site A VPN

SITE A SG320 FW
INTERNAL NETWORK 192.168.XXX.XXX /23

Sites Connected via IPSec VPN Tunnel ( PRESHARED KEY ) - WORKING Fine 

SITE B PFSENSE FW ( NOT MANAGED BY US )
INTERNAL NETWORK 192.168.XXXXX /24

VPN POOL (SSL) Network Address is 10.242.XXXX /24

When a home user connects to SSL VPN to SITE A they can access all applications.
But when trying to connect to applications on SITE B over the VPN it fails

I have tried the following

Added the INTERNAL NETWORK OF SITE B to the SSL VPN LOCAL network

I have tried setting up a NAT RULE but can't get it to work with the settings I have chosen,

1:1 NAT MAP SOURCE

VPN RANGE >>> ANY >>> SITE A LOCAL ADDRESS>> SOURCE TRANSLATION >> SITE B LOCAL ADDRESS 

Any help would be appreciated