Ok well since it seems like the forums are being spammed to death with I CANT CONNECT HELP ME PLOXZ im gunna post this
1. well if your logging in and it says cannot connect at the first screen most likely you need to change the IP or the server has been restarted (it like reconfigures it or something) so just do it 1 or 2 more times
2. at the server select if the server isnt there its not up be patient and wait dont blow a gasket go find something else to do for 10 minutes...
3. when at your character selection if it freezes for more than 2-3 seconds it wont connect(server down)
4. if it dosent freeze at all but just dosent connect that means the connection just made a mistake just do it again(or in some cases the server is down)
5. if i see any more posts about "the server being down plz help" i will be a complete ass and do whatever i can to annoy you 
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ima soldier