List Box doesn't work

Hi guys,

I try to use a List Box, but I think it doesn't work.

For my understanding, I use it for the selection  of multiple values. Or am I wrong?

(The list box of wad works fine on this way. I can select more values.)

Please, dCan anybody try it and give me feedback.

My system settings:

Design Studio: Release 1.0 SP2 (Version: 10.2.0)

IE 9