org.apache.poi.POIXMLException: java.lang.reflect.InvocationTargetException when deployed in JBoss6

I have to upload an excel file in a JBossSeam application. I am using poi3.6 jar. The excel upload is successful in application server JBoss5.1. But I got the an exception when I used JBoss6. How could I resolve this problem? Could any please help me to solve this issue?

The stackTrace is as follows :

2011-02-09 10:20:00,247 ERROR [STDERR] (http-10.120.10.19-8086-1) org.apache.poi.POIXMLException: java.lang.reflect.InvocationTargetException

2011-02-09 10:20:00,247 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.apache.poi.xssf.usermodel.XSSFFactory.createDocumentPart(XSSFFactory.java:61)

2011-02-09 10:20:00,263 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.apache.poi.POIXMLDocumentPart.read(POIXMLDocumentPart.java:256)

2011-02-09 10:20:00,263 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.apache.poi.POIXMLDocument.load(POIXMLDocument.java:196)

2011-02-09 10:20:00,263 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.apache.poi.xssf.usermodel.XSSFWorkbook.(XSSFWorkbook.java:179)

2011-02-09 10:20:00,263 ERROR [STDERR] (http-10.120.10.19-8086-1) at com.ey.SkillTracker.parseutility.EmployeeUploadExcel.parseXlFile(EmployeeUploadExcel.java:113)

2011-02-09 10:20:00,263 ERROR [STDERR] (http-10.120.10.19-8086-1) at com.ey.SkillTracker.bean.administration.EmployeeBean.importEmployeeDetails(EmployeeBean.java:902)

2011-02-09 10:20:00,263 ERROR [STDERR] (http-10.120.10.19-8086-1) at sun.reflect.NativeMethodAccessorImpl.inv开发者_运维技巧oke0(Native Method)

2011-02-09 10:20:00,278 ERROR [STDERR] (http-10.120.10.19-8086-1) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

2011-02-09 10:20:00,278 ERROR [STDERR] (http-10.120.10.19-8086-1) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

2011-02-09 10:20:00,278 ERROR [STDERR] (http-10.120.10.19-8086-1) at java.lang.reflect.Method.invoke(Method.java:597)

2011-02-09 10:20:00,278 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)

2011-02-09 10:20:00,278 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:32)

2011-02-09 10:20:00,294 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)

2011-02-09 10:20:00,294 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)

2011-02-09 10:20:00,294 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)

2011-02-09 10:20:00,294 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:77)

2011-02-09 10:20:00,294 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)

2011-02-09 10:20:00,294 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)

2011-02-09 10:20:00,309 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)

2011-02-09 10:20:00,309 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.jboss.seam.core.SynchronizationInterceptor.aroundInvoke(SynchronizationInterceptor.java:32)

2011-02-09 10:20:00,309 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)

2011-02-09 10:20:00,309 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)

2011-02-09 10:20:00,309 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185)

2011-02-09 10:20:00,325 ERROR [STDERR] (http-10.120.10.19-8086-1) at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103)

2011-02-09 10:20:00,325 ERROR [STDERR] (http-10.120.10.19-8086-1) at com.ey.SkillTracker.bean.administration.EmployeeBean_$$_javassist_seam_18.importEmployeeDetails(EmployeeBean_$$_javassist_seam_18.java)

I got the same issue. I used POI 3.8 and JBoss6.0. The root cause is Classloading conflict between POI lib and JBoss Lib of xmlbeans