dpcalendar plugin not work with latest version of dpcalendar

hi.
i want use the main dpcalendar calendar menu item and use upcoming module in my page.
but when i use the dpcalendar , it's can't loading event.but in the backend it can load the event list only.
when i use upcoming dpcalndar module , if i select joomdle , the joomla return an error :
Error displaying the error page: Call to a member function toUnix() on null: Call to a member function toUnix() on null
look at the screencast movi:
www.screencast.com/t/HB0ECd37By k

edit the previous post and add the link of the film in screencaset.com

tnx and i'm waiting for you...