When I try execute export to XML from a tree item, tomcat crash with error:

ERROR info.magnolia.cms.servlets.MVCServletHandlerImpl 18.05.2010 19:16:36 – can't call command: exportxml
javax.servlet.ServletException: Write permission needed for export. User not allowed to WRITE path [c:\teste.xml]
at info.magnolia.module.admininterface.pages.ExportPage.exportxml(ExportPage.java:240)
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:597)
at info.magnolia.cms.servlets.MVCServletHandlerImpl.execute(MVCServletHandlerImpl.java:123)
at info.magnolia.cms.servlets.CommandBasedMVCServletHandler.execute(CommandBasedMVCServletHandler.java:87)
at info.magnolia.cms.servlets.MVCServlet.doPost(MVCServlet.java:122)
at info.magnolia.cms.servlets.MVCServlet.doGet(MVCServlet.java:68)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at info.magnolia.cms.filters.ServletDispatchingFilter.doFilter(ServletDispatchingFilter.java:183)
at info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:70)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:82)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:84)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:84)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:84)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:84)
at info.magnolia.cms.filters.CompositeFilter.doFilter(CompositeFilter.java:64)
at info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:70)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:82)
at info.magnolia.cms.filters.VirtualUriFilter.doFilter(VirtualUriFilter.java:130)
at info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:70)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:82)
at info.magnolia.module.cache.executor.Bypass.processCacheRequest(Bypass.java:57)
at info.magnolia.module.cache.filter.CacheFilter.doFilter(CacheFilter.java:123)
at info.magnolia.cms.filters.OncePerRequestAbstractMgnlFilter.doFilter(OncePerRequestAbstractMgnlFilter.java:62)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:82)
at info.magnolia.cms.i18n.I18nContentSupportFilter.doFilter(I18nContentSupportFilter.java:75)
at info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:70)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:82)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:84)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:84)
at info.magnolia.cms.security.BaseSecurityFilter.doFilter(BaseSecurityFilter.java:61)
at info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:70)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:82)
at info.magnolia.cms.security.LogoutFilter.doFilter(LogoutFilter.java:89)
at info.magnolia.cms.filters.OncePerRequestAbstractMgnlFilter.doFilter(OncePerRequestAbstractMgnlFilter.java:62)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:82)
at info.magnolia.cms.security.auth.login.LoginFilter.doFilter(LoginFilter.java:80)
at info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:70)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:82)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:84)
at info.magnolia.cms.filters.CosMultipartRequestFilter.doFilter(CosMultipartRequestFilter.java:87)
at info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:70)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:82)
at info.magnolia.cms.filters.ContentTypeFilter.doFilter(ContentTypeFilter.java:90)
at info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:70)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:82)
at info.magnolia.cms.filters.ContextFilter.doFilter(ContextFilter.java:87)
at info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:70)
at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:82)
at info.magnolia.cms.filters.CompositeFilter.doFilter(CompositeFilter.java:64)
at info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:70)
at info.magnolia.cms.filters.MgnlMainFilter.doFilter(MgnlMainFilter.java:96)
at info.magnolia.cms.filters.MgnlMainFilter.doFilter(MgnlMainFilter.java:199)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:619)