diff --git a/App.xaml.cpp b/App.xaml.cpp
index 714dc9e..2594d0e 100644
--- a/App.xaml.cpp
+++ b/App.xaml.cpp
@@ -58,32 +58,36 @@ void App::OnLaunched(Windows::ApplicationModel::Activation::LaunchActivatedEvent
 	Windows::Foundation::Size minsize = { 320.0f, 320.0f };
 	Windows::UI::ViewManagement::ApplicationView::GetForCurrentView()->SetPreferredMinSize(minsize);
 
-	if (m_directXPage == nullptr)
-	{
-		m_directXPage = ref new DirectXPage();
-	}
+	App::ROMDB->Initialize().then([this, e] {
+		if (m_directXPage == nullptr)
+		{
+			m_directXPage = ref new DirectXPage();
+		}
 
 
 
-	// Create a AppShell to act as the navigation context and navigate to the first page
-	//auto shell = ref new AppShell();
+		// Create a AppShell to act as the navigation context and navigate to the first page
+		//auto shell = ref new AppShell();
 
-	//if (shell->AppFrame->Content == nullptr)
-	//{
-	//	// When the navigation stack isn't restored navigate to the first page,
-	//	// suppressing the initial entrance animation and configuring the new 
-	//	// page by passing required information as a navigation parameter
-	//	//shell->AppFrame->Navigate(TypeName(Views::LandingPage::typeid), e->Arguments, ref new Windows::UI::Xaml::Media::Animation::SuppressNavigationTransitionInfo());
-	//}
+		//if (shell->AppFrame->Content == nullptr)
+		//{
+		//	// When the navigation stack isn't restored navigate to the first page,
+		//	// suppressing the initial entrance animation and configuring the new 
+		//	// page by passing required information as a navigation parameter
+		//	//shell->AppFrame->Navigate(TypeName(Views::LandingPage::typeid), e->Arguments, ref new Windows::UI::Xaml::Media::Animation::SuppressNavigationTransitionInfo());
+		//}
 
-	if (e->PreviousExecutionState == ApplicationExecutionState::Terminated)
-	{
-		m_directXPage->LoadInternalState(ApplicationData::Current->LocalSettings->Values);
-	}
+		if (e->PreviousExecutionState == ApplicationExecutionState::Terminated)
+		{
+			m_directXPage->LoadInternalState(ApplicationData::Current->LocalSettings->Values);
+		}
 
-	// Place the page in the current window and ensure that it is active.
-	Window::Current->Content = m_directXPage;
-	Window::Current->Activate();
+		// Place the page in the current window and ensure that it is active.
+	
+		Window::Current->Content = m_directXPage;
+		Window::Current->Activate();
+	});
+	
 }
 
 /// <summary>
diff --git a/DirectXPage.xaml.cpp b/DirectXPage.xaml.cpp
index 1b35555..b69e137 100644
--- a/DirectXPage.xaml.cpp
+++ b/DirectXPage.xaml.cpp
@@ -187,40 +187,33 @@ DirectXPage::DirectXPage():
 	//DL: modified to not do it autmatically
 	//m_main->StartRenderLoop();
 
-	//open the database
-	App::ROMDB->Initialize().then([this, settings]
-	{
-		if (!settings->HasKey("FIRSTSTART"))
-		{
-			settings->Insert("FIRSTSTART", dynamic_cast<PropertyValue^>(PropertyValue::CreateBoolean(false)));
-
-			//copy DEMO ROm then open menu
-			return CopyDemoROM();
-		}
-		else
-			return create_task([] {});
-	//}).then([this]
-	//{
-		//test insert ROM
-		//ROMDBEntry^ entry = ref new ROMDBEntry(0, "Test game", "testgame.gba", "D:\\ROM");
-		//return App::ROMDB->Add(entry);
 
-		//test obtain ROM
-		//auto entry = App::ROMDB->AllROMDBEntries->GetAt(1);
-
-
-
-	}).then([this]
+	// create_task([this] {return CopyDemoROMAsync();}).then([this] //NOTE: this will make CopyDemoROM to run on background thread
+	//and cause exception at entry->Snapshot->SetSourceAsync(stream);
+	
+	CopyDemoROMAsync().then([this]   //NOTE: this let CopyDemonROM to run on UI thread
 	{
-		//open menu
-		RootSplitView->IsPaneOpen = true;
+		//open menu, need dispatcher to move it to UI thread, otherwise exception
+		this->Dispatcher->RunAsync(CoreDispatcherPriority::Normal, ref new DispatchedHandler([this]()
+		{
+			RootSplitView->IsPaneOpen = true;
+		}));
+		
 	});
 	
 
 }
 
-task<void> DirectXPage::CopyDemoROM(void)
+task<void> DirectXPage::CopyDemoROMAsync(void)
 {
+	auto settings = ApplicationData::Current->LocalSettings->Values;
+
+	if (settings->HasKey("FIRSTSTART"))
+		return create_task([] {});
+		
+
+
+	settings->Insert("FIRSTSTART", dynamic_cast<PropertyValue^>(PropertyValue::CreateBoolean(false)));
 
 	StorageFolder ^installDir = Windows::ApplicationModel::Package::Current->InstalledLocation;
 	return create_task(installDir->GetFolderAsync("Assets/"))
diff --git a/DirectXPage.xaml.h b/DirectXPage.xaml.h
index 7d67aa8..7df0082 100644
--- a/DirectXPage.xaml.h
+++ b/DirectXPage.xaml.h
@@ -91,7 +91,7 @@ namespace VBA10
 		StorageFolder^ tmpfolder;
 
 		//function
-		task<void> CopyDemoROM(void);
+		task<void> CopyDemoROMAsync(void);
 		
 
 		// XAML low-level rendering event handler.