VLAN's and NAT

[GusBricker]

Hi,

I'm trying to get NAT reflection working between VLAN's.
Our network looks like this:
VLAN 10 = Web servers
VLAN 100 = Users
pfSense = 2.1.4
We also have a dynamic DNS which clients use to access the web servers. Which works fine.

I'm trying to allow the users (on VLAN 100) to access the web servers via the dynamic DNS URL. I however cannot get it to work.
I have tried both NAT reflection types (Pure NAT and NAT + Proxy) with no luck.

What is the way to get this to work?

Thanks