java.lang.NullPointerException
        at org.netbeans.modules.ruby.railsprojects.ui.customizer.RailsProjectProperties.setServer(RailsProjectProperties.java:155)
        at org.netbeans.modules.ruby.railsprojects.ui.customizer.CustomizerRun.handleServerChanged(CustomizerRun.java:233)
        at org.netbeans.modules.ruby.railsprojects.ui.customizer.CustomizerRun.access$300(CustomizerRun.java:90)
        at org.netbeans.modules.ruby.railsprojects.ui.customizer.CustomizerRun$5.actionPerformed(CustomizerRun.java:219)
        at javax.swing.JComboBox.fireActionEvent(JComboBox.java:1240)
        at javax.swing.JComboBox.setSelectedItem(JComboBox.java:567)
        at javax.swing.JComboBox.setSelectedIndex(JComboBox.java:599)
        at javax.swing.plaf.basic.BasicComboPopup$Handler.mouseReleased(BasicComboPopup.java:816)
        at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:273)
        at java.awt.Component.processMouseEvent(Component.java:6348)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
        at javax.swing.plaf.basic.BasicComboPopup$1.processMouseEvent(BasicComboPopup.java:480)
        at java.awt.Component.processEvent(Component.java:6113)
        at java.awt.Container.processEvent(Container.java:2085)
        at java.awt.Component.dispatchEventImpl(Component.java:4714)
        at java.awt.Container.dispatchEventImpl(Container.java:2143)
        at java.awt.Component.dispatchEvent(Component.java:4544)
        at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4618)
        at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4282)
        at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4212)
        at java.awt.Container.dispatchEventImpl(Container.java:2129)
        at java.awt.Window.dispatchEventImpl(Window.java:2475)
        at java.awt.Component.dispatchEvent(Component.java:4544)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:635)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:117)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)