Trouble signing up for z4 forum

[chopchop]

As per the title, I’ve just picked up an e85 roadster and z4-forum.com seems a lively place to get advise and pick up some spares.
I’m having trouble registering for the site and have tried two different emails with no success, it says to contact an admin should there be any sign up issues but I can’t find any way of contacting them.
if there are any users of the site who could help I’d be grateful.