Blank page with Error! in bold!

Hi,

When i click on Resource monitors (for adding them to a device, or for configuring them in the Admin page) i get a blank page with just the text Error! on it ....

in the stderr file i find th following:

16:46:33:955 PM java.lang.ArrayIndexOutOfBoundsException: -1
16:46:33:955 PM at com.adventnet.me.opmanager.webclient.util.WebClientGraphUtil.getVector(WebClientGraphUtil.java:433)
16:46:33:955 PM at com.adventnet.me.opmanager.webclient.util.WebClientGraphUtil.getGraphProps(WebClientGraphUtil.java:289)
16:46:33:955 PM at com.adventnet.me.opmanager.webclient.admin.customgraph.CustomGraphDetailsAction.execute(CustomGraphDetailsAction.java:55)
16:46:33:955 PM at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
16:46:33:955 PM at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
16:46:33:955 PM at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
16:46:33:955 PM at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
16:46:33:955 PM at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
16:46:33:955 PM at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
16:46:33:955 PM at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
16:46:33:955 PM at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
16:46:33:955 PM at com.adventnet.nms.webclient.login.AuthenticationFilter.doFilter(AuthenticationFilter.java:132)
16:46:33:955 PM at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
16:46:33:955 PM at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
16:46:33:955 PM at com.adventnet.nms.webclient.i18n.EncodingFilter.doFilter(EncodingFilter.java:70)
16:46:33:955 PM at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
16:46:33:955 PM at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
16:46:33:955 PM at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
16:46:33:955 PM at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
16:46:33:955 PM at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
16:46:33:955 PM at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
16:46:33:955 PM at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
16:46:33:955 PM at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
16:46:33:955 PM at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
16:46:33:955 PM at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
16:46:33:955 PM at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2416)
16:46:33:955 PM at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
16:46:33:955 PM at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
16:46:33:955 PM at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
16:46:33:955 PM at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
16:46:33:955 PM at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
16:46:33:955 PM at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
16:46:33:955 PM at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)
16:46:33:955 PM at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
16:46:33:955 PM at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
16:46:33:955 PM at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
16:46:33:955 PM at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
16:46:33:955 PM at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
16:46:33:955 PM at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
16:46:33:955 PM at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
16:46:33:955 PM at org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:466)
16:46:33:955 PM at org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:585)
16:46:33:955 PM at java.lang.Thread.run(Unknown Source)