Contacts 0.4.2 has no services

[Oceanwatcher]

Kubuntu Linux 10.10
KDE 4.6.2
Thunderbird 3.1.8
Contacts 0.4.2 installed from this link

https://addons.mozilla.org/en-US/thunderbird/addon/mozilla-labs-contacts/

My problem is similar to this one:

http://groups.google.com/group/mozilla-labs-online-identity/browse_thread/thread/7fb97910d3f96500/d460d75e654c4c05?lnk=gst&q=thunderbird#

But my version numbers are different. I have also tried to find the
version mentioned at the end of the thread, but have not found the
earlier version either.

Does anyone have any suggestions how to solve this problem? I really
would like to be able to sync my contacts with Plaxo.