Image Tacking with HoloLens2 (based on Vuforia Hololens 1+2 Sample)

Hello Vuforia, 

I am trying to track image targets from my own dataset with HoloLens 2.

Here how I proceed: 

1. As recommended, I start with Vuforia Hololens 1+2 Sample and follow the article Working with the HoloLens Sample in Unity to configure the project. 
2. Then I import my own image target dataset and check that it is listed in VuforiaConfiguration > ok 
3. I add my developpement license key in VuforiaConfiguration
4. In the scene 2-ImageTargets: I keep only 2 ImageTargets and change the Database and Image Target for each to targets of the new dataset. 
5. In this scene I also change the Dataset Name in the EnableVuforia script attached to VuforiaContent gameobject. 
6. Finally build and deploy on HoloLens 2 (following the article instructions)

This new dataset works fine in Unity Player but is not loaded on HoloLens2:

The panel "Active Dataset: " stays empty and it seems that dataset.Load(datasetName) returns false.

> Log : "Failed to load DataSet: datasetName" (EnableVuforia.cs L.130)

Do you know why my dataset cannot be loaded on HoloLens 2 ?

Am I missing something in the way the Sample Project works ?

Does a developpement license key is okay for what i am trying to do ?

Thanks in advance

Best regards

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Details:

• Unity: 2019.2.21f1
• Vuforia : 9.1.7
• Dataset attached