Server Connection Problems [Please Help ;-;]

Hey Guys
I really need help with this, I found some awesome servers and i can't connect to it.

When im on my multiplayers page, the server doesnt 'ping' or do anything it just kinda idles there. But when i click in it, it says connecting to server and it just stays there forever. please help

I've tried other servers like World of architecture, The design conmunity... it just doesnt work