TextBox Packet Error

I just switched over to the Doomed Realms Source, and I can connect to the server just fine, but my buddies can't connect. In the cmd, it says they're connecting to the nexus, but then it says something about Error sending TextBox packet. If anyone know how to fix this that would be great if you could tell me.

screens plz ?

Here's a screenie

imgur(dot)com/HXG5Xd7

You don't need screenshots for this... this is an obvious problem. You edited the wrong client.

Did you change the ip of the client in the rabcadasm folder or the root folder? You should be changing the root folder client