Toolbar icons are question marks

I have been using AutoCAD for a long time and this problem only started in 2014 and has continued into 2015.

I edit and save over icons for custom ribbon panels and toolbars. I assign them to the button and when I hit apply and close the change isn't applied. When I go back to the CUI it is back to the old one but I don't know where that old one is because if I try to reassign it to a bmp file with the same name it is the new one and then goes back.

I have made sure that only the good icons are in my icons folder and that the path in Options/Files is assigned correctly. The palette and toolbars are saved in my workspace but it is not helping.

I went to the icons folder in windows explorer and checked them and they are all the new icons.

Can anyone help me out?

Thanks

Lisa

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Clik here to view.

Image may be NSFW.
Clik here to view.