No apply mask to image

I have version 0.9.20 of Lightburn.
I tried to “apply mask to image”, but the writing in the tools menu remains gray and I can not do anything.
Do you have any suggestions?
Acer portable use with windows 7 32 bit.

Have you selected one image and one other shape that is all closed vectors?

I solved … thanks!
I hadn’t selected with t2 or t1

It doesn’t have to be T1 or T2, but it can’t be a layer you have set to Fill, or that will fill over the part of the image that you keep with the mask.