java.net.ConnectException: Connection timed out: connect

What's this? I don't know the effects of this since I run a private server which doesn't have many people. Could somebody tell me if I can fix this or why it's happening? I think something this is related to my internet.
Here's the log.

Code:

14:19:54 [INFO] AcedGod lost connection: disconnect.endOfStream
14:37:59 [WARNING] Can't keep up! Did the system time change, or is the server o
verloaded?
14:58:53 [SEVERE] java.net.ConnectException: Connection refused: connect
14:58:53 [SEVERE]      at java.net.PlainSocketImpl.socketConnect(Native Method)
 
14:58:54 [SEVERE]      at java.net.PlainSocketImpl.doConnect(Unknown Source)
14:58:54 [SEVERE]      at java.net.PlainSocketImpl.connectToAddress(Unknown Sou
rce)
14:58:54 [SEVERE]      at java.net.PlainSocketImpl.connect(Unknown Source)
14:58:54 [SEVERE]      at java.net.SocksSocketImpl.connect(Unknown Source)
14:58:54 [SEVERE]      at java.net.Socket.connect(Unknown Source)
14:58:54 [SEVERE]      at java.net.Socket.connect(Unknown Source)
14:58:54 [SEVERE]      at sun.net.NetworkClient.doConnect(Unknown Source)
14:58:54 [SEVERE]      at sun.net.www.http.HttpClient.openServer(Unknown Source
)
14:58:54 [SEVERE]      at sun.net.www.http.HttpClient.openServer(Unknown Source
)
14:58:54 [SEVERE]      at sun.net.www.http.HttpClient.<init>(Unknown Source)
14:58:54 [SEVERE]      at sun.net.www.http.HttpClient.New(Unknown Source)
14:58:54 [SEVERE]      at sun.net.www.http.HttpClient.New(Unknown Source)
14:58:54 [SEVERE]      at sun.net.www.protocol.http.HttpURLConnection.getNewHtt
pClient(Unknown Source)
14:58:54 [SEVERE]      at sun.net.www.protocol.http.HttpURLConnection.plainConn
ect(Unknown Source)
14:58:54 [SEVERE]      at sun.net.www.protocol.http.HttpURLConnection.connect(U
nknown Source)
14:58:54 [SEVERE]      at sun.net.www.protocol.http.HttpURLConnection.getInputS
tream(Unknown Source)
14:58:54 [SEVERE]      at me.Irock23.SRPEX.SetRankPEX.versionCheck(SetRankPEX.j
ava:234)
14:58:54 [SEVERE]      at me.Irock23.SRPEX.SetRankPEX$1.run(SetRankPEX.java:50)
 
14:58:54 [SEVERE]      at java.util.TimerThread.mainLoop(Unknown Source)
14:58:54 [SEVERE]      at java.util.TimerThread.run(Unknown Source)