The server is whitelisted (for security reasons). Never give out your Minecraft password under any circumstances.
Only people in the whitelist can access the server.
Post your Minecraft name here so I can add you to the whitelist.
Server URL: smp.skable.co.uk:25599
Server IP (if url is unavailable): 18.104.22.168:25599
Note: IPs are shared between several servers, you must add the port or you'll end up on someone else's server. same goes with the URL.
IRC channel: #crafty (Coldfront)
I've not done much with the forums, but they're usable.