Image Target does not work(Solved)

Holy stupid!!! I forget set vuforia license in Vuforia configuration......

Hi i am newbie

I used Vuforia to detect images excepting to recognize the position and play some videos. The blow is my steps:

1. upload 'Astronaut' to targets manager

2. download the device db

3. import the unity package to unity named 'test'

4. create an ImageTarget GameObject. And specified the db to 'test', then select image target 'Astronaut'

5. add a box as the next level of ImageTarget

6. export Unity project to iOS project

7. run and try to recognize the printed 'Astronaut'

But no effect. The box does not appear. While if i specify the db as 'VuforiaMars_Images'(the default db), and select 'Astronaut', it will work

Why? Anyone could help me?  Thank you