Initial load of Project

Hello,

Am getting this error message when the project is loaded. Any ideas as to how i could avoid this?

thanks,
Mahesh.

com/intellij/openapi/projectRoots/ProjectRootManager
java.lang.NoClassDefFoundError: com/intellij/openapi/projectRoots/ProjectRootManager
at com.gandle.struts.components.BeanComponent.projectOpened(BeanComponent.java:129)
at com.intellij.openapi.project.impl.ProjectImpl.c(ProjectImpl.java:115)
at com.intellij.openapi.project.impl.ProjectImpl.access$200(ProjectImpl.java:42)
at com.intellij.openapi.project.impl.ProjectImpl$MyProjectManagerListener.projectOpened(ProjectImpl.java:2)
at com.intellij.openapi.project.impl.ProjectManagerImpl$1.projectOpened(ProjectManagerImpl.java:25)
at com.intellij.openapi.project.impl.ProjectManagerImpl.e(ProjectManagerImpl.java:259)
at com.intellij.openapi.project.impl.ProjectManagerImpl.openProject(ProjectManagerImpl.java:167)
at com.intellij.ide.impl.ProjectUtil.openProject(ProjectUtil.java:7)
at com.intellij.idea.IdeaApplication.d(IdeaApplication.java:9)
at com.intellij.idea.IdeaApplication.access$500(IdeaApplication.java:4)
at com.intellij.idea.IdeaApplication$IdeStarter$2.run(IdeaApplication.java:4)
at com.intellij.openapi.application.impl.LaterInvocatorEx$FlushQueue.run(LaterInvocatorEx.java:12)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:148)
at com.intellij.ide.IdeEventQueue.a(IdeEventQueue.java:71)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:98)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)