My friend allways showing on in r2p.. even its not running on his pc..

when i write a message i get following error report below - he told me he got the same problem with me..dont know if our error reports where the same.

hope didnt doublepost this problem..

upd:

forgot got win7, he xp, he installed r2p few day's ago - i got it since several months..

upd2: r2p crashes on my pc when he write me a msg, same on his side when i send him a msg.

The allways showing on issue isnt any more.

System.Security.Principal.IdentityNotMappedException: Manche oder alle Identitätsverweise konnten nicht übersetzt werden.
   bei System.Security.Principal.NTAccount.Translate(IdentityReferenceCollection sourceAccounts, Type targetType, Boolean forceSuccess)
   bei System.Security.Principal.NTAccount.Translate(Type targetType)
   bei System.Security.AccessControl.CommonObjectSecurity.ModifyAccess(AccessControlModification modification, AccessRule rule, Boolean& modified)
   bei System.Security.AccessControl.CommonObjectSecurity.AddAccessRule(AccessRule rule)
   bei ReadyToPlay.Utilities.Conversation.SaveHistory()
   bei ReadyToPlay.Forms.UniversalChatWindow._oConversation_MessageAdded(Object sender, MessageAddedEventArgs args)
   bei ReadyToPlay.Utilities.Conversation.OnMessageAdded(MessageAddedEventArgs e)
   bei ReadyToPlay.Utilities.Conversation.AddMessage(String strUserName, String strMessage, String strMessageTimeStamp)
   bei ReadyToPlay.Forms.UniversalChatWindow.SendMessage()
   bei ReadyToPlay.Forms.UniversalChatWindow._txtMessage_KeyUp(Object sender, KeyEventArgs e)
   bei System.Windows.Input.KeyEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   bei System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   bei System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   bei System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   bei System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   bei System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
   bei System.Windows.Input.InputManager.ProcessStagingArea()
   bei System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   bei System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   bei System.Windows.Interop.HwndKeyboardInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawKeyboardActions actions, Int32 scanCode, Boolean isExtendedKey, Boolean isSystemKey, Int32 virtualKey)
   bei System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(MSG& msg, Boolean& handled)
   bei System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(MSG& msg, ModifierKeys modifiers)
   bei System.Windows.Interop.HwndSource.OnPreprocessMessage(Object param)
   bei System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
   bei System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)