calDAV + evolution + FC6 = can't access??

[yonas Abraham]

Hi, I have a calDAV turned on with password protected on an Apache
server running on FC3. I can subscribe to it from Thunderbird and I
can read and write to it. But evolution refused to display it. It goes
with out problem on setting up, it takes my password but I can't check
the box that makes the calendar visible.

$ rpm -qa |grep -i evolution
evolution-2.8.1.1-3.fc6
evolution-data-server-devel-1.8.1-1.fc6
evolution-data-server-1.8.1-1.fc6
evolution-sharp-0.11.1-10.fc6
evolution-webcal-2.7.1-6
evolution-connector-2.8.1-1.fc6

am i missing anything?