vi /etc/freeradius/radiusd.conf & comment the following line.
Note: Make sure u turn the corresponding ssl requiring authentication methods OFF in /etc/freeradius/sites-enabled/default
btw this tutotial although centos 5 centric but it still explains the non-ssl non-mysql testing on ur freeradius server as well.
furthermore this link illustrates using the same with ubuntu/debian distro.
And yeah do check the privileges on the certificates/folder (it should belong to freeradius user (check out /etc/password for that). I think it should fix the ssl error thingy. Cheers