Could you please do a http://www.speedtest.net/ test, and tell me: a. Which internet card you are using, b. Which modem/router you are using, c....
Is the server hosted on your computer? If so, your network is probably the issue... I noticed this happened to all players at the same time; And I...
It's not as easy as it sounds. It would have to involve complicated cronjobs, or a stand-alone application... Coded from scratch.
Maybe it's a client problem? Ask other players on your server about it.
Separate names with a comma.