How to work with Special Matte borders and rounding radius

I am having trouble getting rid of the background (behind the rounding) when I use a Special Matte border on a button. I have set the rounding radius high to demonstrate in the attached graphic.

The rounded rectangle is the desired effect; the button is the undesirable effect.

Suggestions … thx

I don’t think you can solve that.

You can enable transparency but then you loose your color (obviously).
I guess you need to use a transparant button over a (colored) rounded rect.

Hope this helps.

Marcel, Robert:

Thanks - looks like the border as I see it is the way it is … sounds like the rounded rectangle and transparent button is the way to go.

Appreciated,

Michael