Internet not working

[Satyam1]

Hi Guys,
So we were using a router with two VLAN 10 and 20, connected to two different APs and everything was working fine.

Today we purchased a firewall and we placed it before the router (refer to the image). I created two static routes 192.168.110.0 with Gateway 192.168.100.2 and 192.168.120.0 with the same Gateway. Still, we are not able to access the internet.

Any idea what I am doing wrong? Any other way to configure this whole setup?

[_Val_]

It could be a variety of things: policy, NAT, routing, etc. The diagram is not enough to answer your question.

However, how "Switch" would route between networks? It has to be a router, not a switch. 

[Satyam1]

Sry it's a router, not switch.

[PhoneBoy]

What hardware is this?
What version of software is it running?
What precise configuration did you perform?

More information is definitely needed to determine what the problem might be.