[Gvsig_english] errors loading every raster

[G. Allegri]

Hi list.
I've installed gvSIG 1.1 on my Kubuntu 8.04
Everything seems to work fine, excepct I cannot open any kind of raster file.
I have both png, tiff, and ARCINFO binaries.
Everytime I receive the following traceback:

Errore non catturato per l'usario java.lang.NullPointerException: null
    com.iver.cit.gvsig.AddLayer.loadFileLayers(Unknown Source)
com.iver.cit.gvsig.AddLayer.addLayers(Unknown Source)
com.iver.cit.gvsig.AddLayer.execute(Unknown Source)
com.iver.andami.plugins.ExtensionDecorator.execute(ExtensionDecorator.java:88)
    com.iver.andami.ui.mdiFrame.MDIFrame.actionPerformed(MDIFrame.java:616)
    javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
javax.swing.DefaultButtonModel.setPressed(Unknown Source)
javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown
Source)     java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
    java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
java.awt.Component.processMouseEvent(Unknown Source)
javax.swing.JComponent.processMouseEvent(Unknown Source)
java.awt.Component.processEvent(Unknown Source)
java.awt.Container.processEvent(Unknown Source)
java.awt.Component.dispatchEventImpl(Unknown Source)
java.awt.Container.dispatchEventImpl(Unknown Source)
java.awt.Component.dispatchEvent(Unknown Source)
java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
java.awt.Container.dispatchEventImpl(Unknown Source)
java.awt.Window.dispatchEventImpl(Unknown Source)
java.awt.Component.dispatchEvent(Unknown Source)
java.awt.EventQueue.dispatchEvent(Unknown Source)
com.iver.andami.ui.AndamiEventQueue.dispatchEvent(AndamiEventQueue.java:58)
    java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown
Source)     java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown
Source)     java.awt.EventDispatchThread.pumpEvents(Unknown Source)
 java.awt.EventDispatchThread.pumpEvents(Unknown Source)
java.awt.EventDispatchThread.run(Unknown Source)

Any help?
Giovanni