Hm. Here are a few things that come to mind right off the bat:
This might sound a little simple, but double-check that you're connecting to the correct server IP:
play.craftingforchrist.net. Typos happen to everyone.
Make sure your internet connection is stable. Can you visit other internet websites in your browser? Some parental controls block internet access on multiple or all applications – could this apply to you?
You might have been banned from the server (oops), or maybe your IP address is blocked for some reason. There could be a lot of reasons behind this (example: maybe your IP address is be associated to a set of bot accounts that we were attempting to block). Reach out to a Staff Member, and they'll get someone to look into what's going on.