Cannot startup the OSGI framework with tomcat BIRT

<p><span style="color:rgb(40,40,40);font-family:'Source Sans Pro', sans-serif;">Hi,</span><br><br><span style="color:rgb(40,40,40);font-family:'Source Sans Pro', sans-serif;">i'm trying to create a report from a servlet but i keep getting:</span></p>
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<p>org.eclipse.birt.core.exception.BirtException: Cant startup the OSGI framework</p>
<div>at org.eclipse.birt.core.framework.Platform.startup(Platform.java:91)</div>
<div>at org.eclipse.birt.report.service.ReportEngineService.setEngineContext(ReportEngineService.java:320)</div>
<div>at org.eclipse.birt.report.service.BirtViewerReportService.setContext(BirtViewerReportService.java:1022)</div>
<div>at org.eclipse.birt.report.listener.ViewerServletContextListener.contextInitialized(ViewerServletContextListener.java:62)</div>
<div>at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5003)</div>
<div>at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5517)</div>
<div>at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)</div>
<div>at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1574)</div>
<div>at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1564)</div>
<div>at java.util.concurrent.FutureTask.run(Unknown Source)</div>
<div>at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)</div>
<div>at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)</div>
<div>at java.lang.Thread.run(Unknown Source)</div>
<div>Caused by: org.eclipse.birt.core.exception.CoreException</div>
<div>at org.eclipse.birt.core.framework.osgi.OSGILauncher.startup(OSGILauncher.java:90)</div>
<div>at org.eclipse.birt.core.framework.Platform.startup(Platform.java:79)</div>
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<div><strong>the contents of my file config.ini est :</strong></div>
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<div>#Product Runtime Configuration File</div>
<div>eclipse.product=org.eclipse.birt.report.engine.ReportEngineSDK</div>
<div>osgi.bundles=org.eclipse.equinox.common@2:start, org.eclipse.update.configurator@3:start, org.eclipse.birt.core@start</div>
<div>osgi.framework.extensions=org.eclipse.birt.api</div>
<div>osgi.bundles.defaultStartLevel=4</div>
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<div><span style="color:rgb(40,40,40);font-family:'Source Sans Pro', sans-serif;">Can you please help me? Thanks in advance </span></div>
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