1) Start JBoss Dev Studio from new clear WorkSpace
2) Create new Seam 1.2 project in he same workspace using JBossAS
3) Run JBossAS
ASSERT: Everything is OK
4) Import xh (attached) Web project into workspace (configure it for JBossAS)
ASSERT: Exception occurs in console (that is Ok)
5) Go to JBoss server view
6) Right mouse click -> New -> Server
7) Configure Tomcat 6.0 server (add xh project into Tomcat server but do not start it)

java.lang.NullPointerException
at org.jboss.ide.eclipse.as.core.server.internal.ServerListener.serverAdded(ServerListener.java:46)
at org.jboss.ide.eclipse.as.core.server.UnitedServerListenerManager.serverAdded(UnitedServerListenerManager.java:85)
at org.eclipse.wst.server.core.internal.ResourceManager.fireServerEvent(ResourceManager.java:492)
at org.eclipse.wst.server.core.internal.ResourceManager.registerServer(ResourceManager.java:1055)
at org.eclipse.wst.server.core.internal.ResourceManager.addServer(ResourceManager.java:629)
at org.eclipse.wst.server.core.internal.Server.saveToMetadata(Server.java:422)
at org.eclipse.wst.server.core.internal.Base.doSave(Base.java:264)
at org.eclipse.wst.server.core.internal.Server.doSave(Server.java:411)
at org.eclipse.wst.server.core.internal.ServerWorkingCopy.save(ServerWorkingCopy.java:421)
at org.eclipse.wst.server.ui.internal.wizard.WizardTaskUtil.tempSaveServer(WizardTaskUtil.java:149)
at org.eclipse.wst.server.ui.internal.wizard.WizardTaskUtil$4.performFinish(WizardTaskUtil.java:65)
at org.eclipse.wst.server.ui.internal.wizard.TaskWizard.executeTask(TaskWizard.java:256)
at org.eclipse.wst.server.ui.internal.wizard.TaskWizard$2.run(TaskWizard.java:213)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1800)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1782)
at org.eclipse.wst.server.ui.internal.wizard.page.WorkspaceRunnableAdapter.run(WorkspaceRunnableAdapter.java:35)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)