EditVoicepack Error

[doylie22]

I'm getting the following error code on startup

Exception has been thrown by the target of an invocation.
at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.RuntimeType.InvokeMember(String name, BindingFlags bindingFlags, Binder binder, Object target, Object[] providedArgs, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParams)
at Bevelstone.EditVoicepack.InstallerApi.InternalUseOnly.AppDomainEntryPoint.IsProcessElevationRequired(String processUpdaterPath, String flightSimulatorPath, Boolean updateAirlinesCfg) in D:\Documents\Bevelstone\Flight Simulator\EditVoicepack\InstallerApi\InternalUseOnly.cs:line 71
at Bevelstone.EditVoicepack.InstallerApi.InternalUseOnly.AppDomainEntryPoint.IsProcessElevationRequired(String processUpdaterPath, String flightSimulatorPath, Boolean updateAirlinesCfg)
at Bevelstone.EditVoicepack.InstallerApi.VoicepackUpdater.GetIsProcessElevationRequired(Boolean updateAirlinesCfg) in D:\Documents\Bevelstone\Flight Simulator\EditVoicepack\InstallerApi\VoicepackUpdater.cs:line 149
at Bevelstone.EditVoicepack.Client.MainForm.FileSubmenuOpened(Object sender, RoutedEventArgs e) in D:\Documents\Bevelstone\Flight Simulator\EditVoicepack\Client\MainForm.xaml.cs:line 660

Arithmetic operation resulted in an overflow.
at Bevelstone.EditVoicepack.UpdateProcess.VistaTools.IsReallyVista() in D:\Documents\Bevelstone\Flight Simulator\EditVoicepack\UpdateProcess\VistaTools.cs:line 95
at Bevelstone.EditVoicepack.UpdateProcess.ApiEntryPoint.IsProcessElevationRequired(String flightSimulatorPath, Boolean updateAirlinesCfg) in D:\Documents\Bevelstone\Flight Simulator\EditVoicepack\UpdateProcess\ApiEntryPoint.cs:line 26

[Lars]

Please try starting EditVoicepack by right clicking and select Run as administrator.