AddNew does not create a new Item !

[cdubet]

Why I my new element is not in list ??

Element^ CodeViewPackage::AddElementType(Element^ elem, String^ type, String^ name) {
int nb=elem->EmbeddedElements->Count; // old value


//create a new item
Element^% el = safe_cast<Element^>(elem->EmbeddedElements->AddNew(name,”test”));
       if (el ==nullptr)    {
         log->Error("AddElementType failed: element=nullptr!");
         return nullptr;
       }
el->Update();
elem->EmbeddedElements->Refresh();
int nb2=elem->EmbeddedElements->Count;
// nb2== nb !!!