Theme problem by Calculator for N73

[D3s3rt]

Hello everybody and sorry for my bad English

I make a theme for my N73. Everything works fine. The only problem is by the Calculator.

I can’t see the selection of the buttons + - : …
I don’t know what selection is for that buttens.

Maybe the selection is to small but I don’t know how to change it.

Is there a trick?
Can anybody give me a tutorial or something?

[Kubilay_]

It is not available to edit butons of calculator by carbide.

[D3s3rt]

Thanks, but where can i change the background selection?

Screenshots from Mobile

Original Nokia;with selection - - - - My Theme; no selection

help please

[Kubilay_]

It should be same with Grid Highlight Item or an other highlight item.