GetType(Code) failing when retrieving LocalSettings

Question

I am having problems retrieving items from from the local data store.  I insert using this:

ApplicationDataContainer^ localSettings = ApplicationData::Current->LocalSettings;
auto values = localSettings->Values;
int boolValue = lua_toboolean( L, 2 );
values->Insert( key, dynamic_cast<PropertyValue^>( PropertyValue::CreateBoolean( boolValue != 0 ) ) );

I try to retrieve like this:

ApplicationDataContainer^ localSettings = ApplicationData::Current->LocalSettings;
auto values = localSettings->Values;
IPropertyValue^ prop = dynamic_cast<IPropertyValue^>( localSettings->Values->Lookup( key ) );
Type^ type = prop->GetType();
TypeCode tc = Type::GetTypeCode( type );

switch ( tc ) {

However tc is always Object and not TypeCode::Boolean like I expect.  I realize I can cast it to Boolean or whatever and probably get it to work, but this is test code and the real code is only asked to retrieve a key and has no idea the type stored there so I must figure it out at read time. 

Can someone tell me what I am missing here?

Regards, Guy