CXTButton & Icons

Hello,

i've a static CXTPImageManager

    if (s_FileItemImages.GetImages()->GetCount() == 0 )
    {
        s_FileItemImages.SetMaskColor(RGB(0,255,255));
        s_FileItemImages.SetIcons(IDB_GRIDITEMFILE, 0, 3, CSize(12, 12));
    }
the bitmap has 3 pictures and has a size from 35x12 pixel.

Now i like to set this Icon to a CXTButton
m_wndSave.SetIcon(CSize(12,12), s_FileItemImages.GetImage(0,12)->GetIcon());
This will work.
But
m_wndLoad.SetIcon(CSize(12,12), s_FileItemImages.GetImage(1,12)->GetIcon());
does not show a icon into the button.
Why ?

    Jimmy