Mail works fine, but when I try to sync with contacts og calendar I get an "Authentication failed", and with the calendar, I get an additional "Unable to go online"..

I'm currently using the ZimbraEvolution plugin with Evolution 2.10.1 on Gentoo.. I have altered the configure script a little to allow me to install ZimbraEvolution on a Evolution 2.10.1, but I have the same problem on Evolution 2.8.3