Question My webcam doesn't work at built program.

Hi.

Recently, I started the Unity for AR desktop program(Vuforia).

I connected USB web cam on my desk top and set the AR camera on the Unitiy.

The program found the cam, and it worked when I played on the Unity.

But after i built it, There are no camera scene in my program...
(Every Other objects else is visible.)


My built setting is (PC, Mac, & Linux Standalone), and i didn't touch any other settings...

Can I get some advice on this?

Thanks...