How do i access the beta 1.12 server? I have the Beta Rank

You need to download the latest 1.12.2 build from:
http://sub.swdteam.com/nightly-dm-builds/the%20new%20build.jar

Then click on the Dalek Mod servers button on the title screen and click on DMU Public 1.12.2

Thank you!

Also for anyone who does play in the beta server please do not use the key as it is broken and the flight panel is broken so for your own safety DO NOT USE THESE THEY ARE TO SOON BE FIXED!