I seem to be having trouble joining the beta testing server when I try to join it says

Failed to connect to the server

This server requires SWD team Beta Access! (https://SWDTeam.com/beta)

Yes, i have logged in yes I am using the correct mod version and yes I am a beta tester so someone please help me fix this.

Hey, we've been updating the mod to 1.12.2 these past few months. John just hasn't updates the website to link to the latest download. Here is the latest beta build: http://sub.swdteam.com/nightly-dm-builds/Dalek%20Mod%20TB-(16.12.2017).jar   I think that might be the problem.

I am logged in

 and yes I am using that build of the mod.

Redownload it, this build just came out yesterday.

You need to add your Minecraft Username to your account

https://swdteam.com/account

 It says username taken because I typed it in before and it worked but it just doesn't show up when I go and edit when I am logged in to the Minecraft mod it does say I am a beta tester.