Firewall Routes

Dears,

I have a sophos SG 330 firewall

I'm trying to reach a new test cloud subnet from my internal network,

a static route has been configured also on the core switch before starting to work on the SG box

I have performed the below configuration on SG BOX:

• create new network object and assign the corresponding network ID
• from Interface and routing I have navigated to static routing than cloned the existing route that is existing for the production environment on cloud and replace the object with new created one then I saved the configurations.
• from my Network Protection tab I selected firewall option and allowed all traffic from the new subnet to the inside network and vise versa than I saved the configurations

as per my knowledge that should be enough to reach the destination network, however, the Servers on the destination networks are not reachable from any vlan inside my network, in addition to that I tried to traceroute the servers IP from a local workstation and the last point before network unreachability is the SG Box.

is this issue familiar?

can any one help me to solve it?

Best Regards in Advance