Double calender after upgrading to Windows 8

Hi,

I have upgraded from Windows 7 to 8.

I did only keep the personal files, and have downloaded Office 2010 again and started it up.

In the calender I now have a problem with "Calender and "Kalender" as they are 2 different calenders(?):

All old appointments are in the "Kalender" => written in Norwegian

All New appointment requests are put into "Calender" => the English spelling of "calender"

I want my New appointments to get into the "Kalender" together with all the appointments I have set up already. But there is no where I can change it?

please support, such that I only have the "Kalender" in use.

tc