Nao consigo colocar o breakpoint no netbeans

Aparece a seguinte mensagem no rodape do netbeans

java.lang.NullPointerException
at org.netbeans.modules.tomcat5.jsps.FindJSPServletImpl.getTagHandlerClassName(FindJSPServletImpl.java:123)
at org.netbeans.modules.tomcat5.jsps.FindJSPServletImpl.getServletResourcePath(FindJSPServletImpl.java:68)
at org.netbeans.modules.j2ee.deployment.devmodules.api.JSPServletFinder.getServletResourcePath(JSPServletFinder.java:124)
at org.netbeans.modules.web.debug.util.Utils.getServletClass(Utils.java:133)
at org.netbeans.modules.web.debug.util.Utils.getClassFilter(Utils.java:145)
at org.netbeans.modules.web.debug.breakpoints.JspLineBreakpoint.(JspLineBreakpoint.java:72)
at org.netbeans.modules.web.debug.breakpoints.JspLineBreakpoint.create(JspLineBreakpoint.java:101)
at org.netbeans.modules.web.debug.actions.JspToggleBreakpointActionProvider.doAction(JspToggleBreakpointActionProvider.java:100)
at org.netbeans.spi.debugger.ActionsProvider$1.run(ActionsProvider.java:77)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:493)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:926)

Evandro