Wallpaper not working at startup

I have a multi monitor set up and have the desktop wallpaper rotating from a folder of pics but when I start the system, there is no wallpaper selected and I have to turn it on each time. Is there a setting somewhere I need to activate? Thanks.

Hmmm...that's strange. Then again, I've never used a multi-monitor setup either. All that I can suggest is...

Right click on the desktop and click on "Desktop Settings".

Is your folder (that you have the pictures in) showing as the folder that the desktop images are being used from?

Do you have a check mark next to "Apply to all workspaces"?