Themes problem SP2

> Hello
>
> My problem is this. I have tried changing the desktop
> theme in SP2, but the only thing that changes is the
> wallpaper, and the desktop icons. The taskbar at the
> bottom of the screen just changes color to match the
> theme, but it doesn't change the font type, or other
> properties associated with the theme. These are themes
> that worked perfectly until today. When I right-click on
> the desktop, and go into properties, and then appearance,
> somehow, it has reverted back to Windows Classic Style.
> When I then change the appearance to the same type as the
> theme installed, and click on apply, it doesn't change.
> This happens with all the themes I have installed. Is
> there a way of changing some kind of settings that will
> allow all the properties of a theme to be installed, and
> not just parts? Or, could there be a program installed,
> that is causing this problem? If anyone needs any further
> information, or has any questions, please contact me.
> Again, these are themes that were installed, and worked
> perfectly until today.
>
> Any help would be greatly apprciated.
>
> Neo
>