The Arbortext Editor's icons is missing, why?

Hi,

One of our colleague meet a problem, the Arbortext Editor's icons is missing, but still have button or a black line, you can click it.

When setup the installation package and select "Repair", it will OK. But when using one day or two, the icons missed again.

I think maybe the icons files is lost, why? Is there any programsare not compatiblewith the editor?

Thanks!