first off all, please try to update to version 1.6 for the editor and the server (yun).
This brings us all on the same page...
Second I can see that you name your object "test" but you name your target "sliderXXXXXXXXXXXX".
This will not work.
You need to generate a target that has the same name then the object.
When you click on add Target, the interface will provide you with the right name that you only need to copy past.
If this is not the case, please delete your test object and try it again.
I am sorry that this is so complicated, but it is out of our hands. It is the cumbersome Vuforia interface that makes all the trouble. If I would be able to have control over the target generation, you would just drag and drop a JPG image and thats about it. No complicated naming.