Sorry, I forgot I had removed the login window from the maintenance page; the login window is back on the page (click on Admin-login and enter credentials mentioned above); you can change language if French comes up as a default language (but it shouldn't :-))
I'm on the latest WP version (3.9.1).
Theme is 2012.
Slideshow settings from the NextCellent gallery menu are as follows:
Default size: 600x400
Duration: 7 seconds
Transition/fade effect: fade
Settings for the JW Image Rotator
Enable flash slideshow: unchecked
Path to the JW Image Rotator (URL): empty (I can't install it; instructions aren't clear; when I click on Search now, nothing happens)
I think the rest is irrelevant; if it isn't, let me know what other parameters you want to see.
I think that the problem is that I have neither systems properly installed (Rotator or Flash).
Thank you for your time.