[Plugin: Events Manager] popup calender not working in add event screen

Hi,

For a while the calender on the add event page is not working anymore. I haven’t got a clue what the reason could be. Normally if you would click on the field the calender would be a popup and you could just click yourself to the right date. Now I tried to insert the date myself into the field but than the system does not pick the right date and because of that my events are far away from being in the right order…

Someone knows the answer?

http://wordpress.org/extend/plugins/events-manager/