Thank you for the golden tip about the correct version.
I completely oversaw that the KDE PIM has another version as the rest of KDE :(
I only checked the KDE version which was 4.6.2 on Natty and 4.6.1 on Maverick.
So I concluded if it works in the old one, it also should work in the new one.
After installing the KDE PIM from ppa:kubuntu-ppa/experimental it now also is available in Natty.
Dear Philip
Thank you for the golden tip about the correct version.
I completely oversaw that the KDE PIM has another version as the rest of KDE :(
I only checked the KDE version which was 4.6.2 on Natty and 4.6.1 on Maverick.
So I concluded if it works in the old one, it also should work in the new one.
After installing the KDE PIM from ppa:kubuntu- ppa/experimenta l it now also is available in Natty.
Best regards