alba.mgs8 on "[Theme: Mon Cahier] Password Protected Pages not working"

Hi,

Since changing to mon cahier theme my Password Protected pages are not working properly. I get the prompt to input my password but after putting in the correct password and clicking on submit, the screen refreshes like it's going to load the page but only brings up the prompt for the password again. What can I do?

http://wordpress.org/themes/mon-cahier/