How to connect to two ISPs

Hello,

I have 4 dell powerconnect 6248 in a switch stack. Multiple vlans are configured and operating correct. We are connected to internet via ASA

So basically the config is:

Vlan 10 192.168.10 ./24

to

Vlan 30 192.168.30.0/24

Vlan 9 is 192.168.9.0/30

with 192.168.1.1 being the dell's svi & 192.168.1.2 being ASA's inside port

Everything works, inter-vlan, internet etc.

We just got another internet connection.

I have already configured router with basically the same setup

vlan 33 192.168.33.0/30

192.168.33.1 dell svi

192.168.33.2 router inside port

Now I want 1 vlan to use the second router as default gateway

the default gateway current on the switch points to 192.168.1.2 (ASA - First ISP)

I want to use the second ISP for VLAN 20

I have tried just specifying the route manually by

ip route 192.168.20.0 0.0.0.255 192.168.33.2 0.0.0.0 but it doesn't work.

Is it possible to use two ISPs where I have 2 seperate gateways.

Thanks for your time and help.

Gurpreet