internal error when working with the query-builder

While working with the query-builder I and error. when perssing the "quickly add table to the query" button and perssing the down arrow to show all tables I get the following error. I'm working on Windows and Informix DB. JDBC driver version: informix-jdbc-3.50.JC8.jar An internal error occurred in: java.lang.NoClassDefFoundError: com/onseven/dbvis/editor/F The error may have affected the application state. Please notify vendor. Thread: AWT-EventQueue-1 Stack Trace: java.lang.NoClassDefFoundError: com/onseven/dbvis/editor/F at com.onseven.dbvis.C.A.L$2.updateHints(Z:3553) at com.jidesoft.hints.AbstractIntelliHints.showHints(Unknown Source) at com.jidesoft.hints.AbstractIntelliHints.showHintsPopup(Unknown Source) at com.jidesoft.hints.AbstractIntelliHints$3.delegateActionPerformed(Unknown Source) at com.jidesoft.swing.DelegateAction.actionPerformed(Unknown Source) at javax.swing.SwingUtilities.notifyAction(Unknown Source) at javax.swing.JComponent.processKeyBinding(Unknown Source) at javax.swing.JComponent.processKeyBindings(Unknown Source) at javax.swing.JComponent.processKeyEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source) at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source) at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source) at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source) at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$000(Unknown Source) at java.awt.EventQueue$1.run(Unknown Source) at java.awt.EventQueue$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source) at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue$2.run(Unknown Source) at java.awt.EventQueue$2.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at com.onseven.dbvis.K.A.V.dispatchEvent(Z:2143) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) System Information: Product: DbVisualizer Personal 720.1638 Build: #1638 (2011/05/02 13:47) Java VM: Java HotSpot(TM) Client VM Java Version: 1.6.0_24 Java Vendor: Sun Microsystems Inc. OS Name: Windows XP OS Arch: x86 OS Version: 5.1