Anyone got any ideas what to do or how to go about solving this?
Another point to note is that this configuration worked previously when I was using the standard DD-WRT v24-sp1 mega - build for the Asus WL-500W.
Could there be a problem with OpenVPN in the Eko build?
I know you will say go back to the standard build which works but I upgraded in the first place to Eko as a lot of routers seemed to be bricking with the standard mega build.