Problems with deploying code on CRio through Netbeans

[Team1605]

Hello guys,
i am using netbeans/java to program our teams robot. when i try to deploy it on to the crio i get an error like:
C:\Users\JAY.JAY-HP\sunspotfrcsdk\build.xml:96: The following error occurred while executing this line:
C:\Users\JAY.JAY-HP\sunspotfrcsdk\ant\upgrade.xml:40:
java.net.SocketException: Software caused connection abort: recv failed
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream. java:150)
at java.net.SocketInputStream.read(SocketInputStream. java:121)
at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.j ava:283)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.ja va:325)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:1 77)
at java.io.InputStreamReader.read(InputStreamReader.j ava:184)
at java.io.BufferedReader.fill(BufferedReader.java:15 4)
at java.io.BufferedReader.read(BufferedReader.java:17 5)
at org.apache.commons.net.io.CRLFLineReader.readLine( CRLFLineReader.java:58)
at org.apache.commons.net.ftp.FTP.__getReply(FTP.java :310)
at org.apache.commons.net.ftp.FTP.__getReply(FTP.java :290)
at org.apache.commons.net.ftp.FTP.sendCommand(FTP.jav a:474)
at org.apache.commons.net.ftp.FTP.sendCommand(FTP.jav a:547)
at org.apache.commons.net.ftp.FTP.port(FTP.java:872)
at org.apache.commons.net.ftp.FTPClient._openDataConn ection_(FTPClient.java:667)
at org.apache.commons.net.ftp.FTPClient.retrieveFile( FTPClient.java:1595)
at com.sun.spot.sdk.tool.ftp.UpgradeTask.checkVersion (UpgradeTask.java:34)
at com.sun.spot.sdk.tool.ftp.UpgradeTask.execute(Upgr adeTask.java:215)
at org.apache.tools.ant.UnknownElement.execute(Unknow nElement.java:291)
at sun.reflect.GeneratedMethodAccessor68.invoke(Unkno wn Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.tools.ant.dispatch.DispatchUtils.execut e(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:39 0)
at org.apache.tools.ant.Target.performTasks(Target.ja va:411)
at org.apache.tools.ant.Project.executeSortedTargets( Project.java:1399)
at org.apache.tools.ant.helper.SingleCheckExecutor.ex ecuteTargets(SingleCheckExecutor.java:38)
at org.apache.tools.ant.Project.executeTargets(Projec t.java:1251)
at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java :442)
at org.apache.tools.ant.taskdefs.CallTarget.execute(C allTarget.java:105)
at org.apache.tools.ant.UnknownElement.execute(Unknow nElement.java:291)
at sun.reflect.GeneratedMethodAccessor68.invoke(Unkno wn Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.tools.ant.dispatch.DispatchUtils.execut e(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:39 0)
at org.apache.tools.ant.Target.performTasks(Target.ja va:411)
at org.apache.tools.ant.Project.executeSortedTargets( Project.java:1399)
at org.apache.tools.ant.Project.executeTarget(Project .java:1368)
at org.apache.tools.ant.helper.DefaultExecutor.execut eTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Projec t.java:1251)
at org.apache.tools.ant.module.bridge.impl.BridgeImpl .run(BridgeImpl.java:285)
at org.apache.tools.ant.module.run.TargetExecutor.run (TargetExecutor.java:539)
at org.netbeans.core.execution.RunClassThread.run(Run ClassThread.java:153)