Currently there’s a problem with the JDK version 7 and FTP Uploading. While a bug-report has been filed (http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7077696), it’s been assigned with low priority. It’s an easy fix though.
For the people who’d like to use NetBeans / Other software to upload files using FTP, there’s an easy fix. The problem is with the firewall “Stateful FTP” filter, and you can disable it by running the following code, in a command promt:
netsh advfirewall set global StatefulFTP disable
As always when using the command promt, remember to run it as administrator.
Once that comand has been run, you should now be able to upload again.