Mywebmethos Error code

Hello friend
I am getting problem in mywebmethods server
error code is given below can anyone help me in this issue?

[POP.004.0104] Error installing/uninstalling component

com.webmethods.portal.bizPolicy.BizException: [POP.002.0105] Failed to load xml document from D:/webMethods7/MWS/server/default/
at com.webmethods.portal.bizPolicy.command.system.xml.XMLImport.createBean(XMLImport.java:125)
at com.webmethods.portal.bizPolicy.command.install.taskdefs.system.ExecuteCommand._execute(ExecuteCommand.java:86)
at com.webmethods.portal.bizPolicy.command.install.taskdefs.AntBaseTask.execute(AntBaseTask.java:90)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:357)
at org.apache.tools.ant.Target.performTasks(Target.java:385)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
at com.webmethods.portal.service.install.impl.ant.AntRunner.run(AntRunner.java:170)
at com.webmethods.portal.service.install.impl.ant.AntInstallService.executeAntTarget(AntInstallService.java:129)
at com.webmethods.portal.service.install.impl.ant.AntInstallService.install(AntInstallService.java:63)
at com.webmethods.portal.mech.install.impl.BasicInstallMechanics.installComponent(BasicInstallMechanics.java:656)
at com.webmethods.portal.mech.install.impl.BasicInstallMechanics.installComponentSafe(BasicInstallMechanics.java:749)
at com.webmethods.portal.bizPolicy.command.install.InstallComponent.installComponent(InstallComponent.java:76)
at com.webmethods.portal.bizPolicy.biz.install.impl.InstallPolicy.installComponent(InstallPolicy.java:31)
at com.webmethods.portal.bizPolicy.biz.install.impl.InstallPolicy.installComponent(InstallPolicy.java:26)
at com.webmethods.portal.portlet.impl.wm_installadmin.InstallAdmin.onFinish(InstallAdmin.java:135)
at com.webmethods.portal.portlet.impl.wm_installadmin.InstallAdmin.finish(InstallAdmin.java:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.webmethods.portal.mech.portlet.impl.PortletMechanics.executePortletMethod(PortletMechanics.java:114)
at com.webmethods.portal.bizPolicy.command.portlet.ExecutePortletMethod.executePortletMethod(ExecutePortletMethod.java:53)
at com.webmethods.portal.framework.portlet.LegacyPortletContainer.process(LegacyPortletContainer.java:229)
at com.webmethods.portal.framework.portlet.LegacyPortletContainer.processPortletAction(LegacyPortletContainer.java:110)
at com.webmethods.portal.framework.portlet.beans.rest.RestfulPCAHandler.handle(RestfulPCAHandler.java:182)
at com.webmethods.portal.framework.dispatch.DispatchManager.handle(DispatchManager.java:438)
at com.webmethods.portal.framework.dispatch.DispatchManager.handleDispatch(DispatchManager.java:371)
at com.webmethods.portal.framework.impl.PortalServlet.service(PortalServlet.java:242)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:830)
at com.webmethods.portal.framework.impl.NTLMFilter.doFilter(NTLMFilter.java:50)
at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
at com.webmethods.caf.faces.servlet.GZIPFilter.doFilter(GZIPFilter.java:38)
at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:471)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:633)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
at com.webmethods.portal.webApplication.WmWebAppContext.handle(WmWebAppContext.java:159)
at org.mortbay.http.HttpServer.service(HttpServer.java:909)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:820)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:986)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:837)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:245)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)