problem with applying new setting... it's not changing color.. both background and border. spacing n size are working.. could someone help?

First of all are you using Version 2.22b ?

Secondly I would make this check

It would then be most helpful if you could describe your problem in detail.

Are you saying that when you select a background it does not appear ?

Is there a space in the background file name ?

Please see this post

In the next Version will be resolved.

Thank you