Problema no iReport - Erro estranho! =((((((

Pessoal, estou tentando fazer abrir um relatorio e esta dando esse erro estranho:

[color=red]Exception in thread “AWT-EventQueue-0” java.lang.ExceptionInInitializerError
at net.sf.jasperreports.extensions.ExtensionsEnvironment.createDefaultRegistry(ExtensionsEnvironment.java:73)
at net.sf.jasperreports.extensions.ExtensionsEnvironment.(ExtensionsEnvironment.java:68)
at net.sf.jasperreports.engine.util.JRStyledTextParser.(JRStyledTextParser.java:76)
at net.sf.jasperreports.engine.fill.JRBaseFiller.(JRBaseFiller.java:181)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.(JRVerticalFiller.java:76)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.(JRVerticalFiller.java:86)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.(JRVerticalFiller.java:56)
at net.sf.jasperreports.engine.fill.JRFiller.createFiller(JRFiller.java:142)
at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:52)
at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:417)
at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:247)
at br.com.recibo.ImprimirRecibo.jButton1ActionPerformed(ImprimirRecibo.java:160)
at br.com.recibo.ImprimirRecibo.access$000(ImprimirRecibo.java:27)
at br.com.recibo.ImprimirRecibo$1.actionPerformed(ImprimirRecibo.java:101)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6263)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3255)
at java.awt.Component.processEvent(Component.java:6028)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4630)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2475)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: net.sf.jasperreports.engine.JRRuntimeException: Error loading the properties
at net.sf.jasperreports.engine.util.JRProperties.initProperties(JRProperties.java:183)
at net.sf.jasperreports.engine.util.JRProperties.(JRProperties.java:150)
… 39 more
Caused by: net.sf.jasperreports.engine.JRException: Default properties file not found.
at net.sf.jasperreports.engine.util.JRProperties.getDefaults(JRProperties.java:210)
at net.sf.jasperreports.engine.util.JRProperties.initProperties(JRProperties.java:160)
… 40 more[/color]

Alguem sabe o que pode ser?
Eu coloquei os jars do jasperreports na biblioteca e tambem a pasta NET e ORG na pasta src.
O codigo que estou usando para chamar é assim:

[code]try {
Connection con = new AcessoFireBird().conectar();
HashMap parametros = new HashMap();
JasperPrint jp = JasperFillManager.fillReport("./src/br/com/recibo/impRecibo.jasper", parametros, con);
JasperViewer jvr = new JasperViewer(jp);
jvr.setVisible(true);

    } catch (Exception e) {
        e.printStackTrace();
    }[/code]

Está certo oq ue fiz até agora?
Nossa…que coisa, viuuuuuu!!!
heheheehe…

Pessoal obrigado ai pelo espaço.
Abraço.