Peplink and IP setup

All,

I know what is going on however I do not know how to fix it.

I have a Peplink Router (Peplink Balance 580) Firmware 6.2.2 build 3362.

When I static IP WAN2 with IP and give it the GW of the Comcast Router, it fails the DNS check.  I shut off DHCP on the Comcast router and also put it in bridge mode with the same results.

WAN1 is being used by FIOS and has a static IP with no issues.

I have an idea as to why it is failing, something with NAT and the two interfaces.

Anyone have any ideas?