[Plugin: Frontpage-Slideshow] Changes not applying

The slide show is showing up on the static home page, but every time I try to make a change to the settings I get the following message, and it doesn’t save the settings regardless of what I changed.

I reset the plugin and de-activated it, and re-activated it. All I did was change the categories. The categories do show up in the preview. Then, when I save the changes I get the message:

theme is using Atahualpa 3.5.3

The options have NOT been updated.

The following values got to be corrected :

The slideshow background color
The slideshow border color
The font color
The buttons bar background color
The buttons’ color (normal state)
The buttons’ color (hover)
The buttons’ color (current)
The main text background color