Error 500: Server caught unhandled exception from servlet

Opsætning: IIS 5.0 som forwarder til was single server edition 4.

Alle sider som kalder en bønne (som bare laver et sql kald) giver en "Error 500: Server caught unhandled exception from servlet [JSP 1.1 Processor]: null"

Siderne har tidligere virket på en anden opsætning så fejlen burde ikke ligge i selve koden.

Default_server_stdout.log :
[04.02.23 08:14:16:437 CET] 7a2711e4 ServletInstan X SRVE0068E: Did not realize service() exception thrown by servlet JSP 1.1 Processor: javax.servlet.ServletException
    at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:498)
    at leftnavi_jsp_2._jspService(leftnavi_jsp_2.java:600)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:127)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspServlet.java:286)
    at org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java:415)
    at org.apache.jasper.runtime.JspServlet.service(JspServlet.java:532)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at com.ibm.servlet.engine.webapp.StrictServletInstance.doService(ServletManager.java:718)
    at com.ibm.servlet.engine.webapp.StrictLifecycleServlet._service(StrictLifecycleServlet.java:160)
    at com.ibm.servlet.engine.webapp.ServicingServletState.service(StrictLifecycleServlet.java:307)
    at com.ibm.servlet.engine.webapp.StrictLifecycleServlet.service(StrictLifecycleServlet.java:105)
    at com.ibm.servlet.engine.webapp.ServletInstance.service(ServletManager.java:428)
    at com.ibm.servlet.engine.webapp.ValidServletReferenceState.dispatch(ServletManager.java:870)
    at com.ibm.servlet.engine.webapp.ServletInstanceReference.dispatch(ServletManager.java:788)
    at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:439)
    at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:239)
    at com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:104)
    at com.ibm.servlet.engine.srt.WebAppInvoker.doForward(WebAppInvoker.java:61)
    at com.ibm.servlet.engine.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:132)
    at com.ibm.servlet.engine.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:67)
    at com.ibm.servlet.engine.invocation.CacheableInvocationContext.invoke(CacheableInvocationContext.java:106)
    at com.ibm.servlet.engine.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:125)
    at com.ibm.servlet.engine.oselistener.OSEListenerDispatcher.service(OSEListener.java:271)
    at com.ibm.servlet.engine.http11.HttpConnection.handleRequest(HttpConnection.java:49)
    at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:303)
    at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:232)
    at com.ibm.ws.util.CachedThread.run(ThreadPool.java:122)