Simple SNAT iRule in Route Domain

Hi,

I'm trying to use an iRule to just forward the traffic to the Internet and SNAT it, when all the pool member are down.

I implemented the following iRule, I can see the iRule hits and executions but the traffic is not coming out of the box. This is being done in a specific Route Domain as you can see in the snat IP.

Should this work? What can be wrong?

when HTTP_REQUEST {

Thanks!