Debuging plugin

I am trying to debug plugin with Plugin Registration tool.

I am getting flowing error , when i try to set profile location :

Unhandled Exception: System.ArgumentException: Unable to parse the OrganizationServiceFault.
Parameter name: serializedReport
   at PluginProfiler.Library.ProfilerUtility.ExtractReport(String serializedReport)
   at PluginProfiler.Library.ProfilerUtility.DeserializeProfilerReport(String assemblyFilePath, String logFilePath)
   at PluginProfiler.Library.ProfilerExecutionUtility.RetrieveReport(String logFilePath)
   at Microsoft.Crm.Tools.PluginRegistration.OrganizationHelper.ParseReportOrShowError(IWin32Window owner, FileBrowserControl profilePathControl, Boolean requireReportParse, ProfilerPluginReport& report)
Inner Exception: System.InvalidOperationException: Message does not contain a serialized value.
   at PluginProfiler.Library.ProfilerUtility.ExtractReportFromFault(OrganizationServiceFault fault)
   at PluginProfiler.Library.ProfilerUtility.ExtractReport(String serializedReport)