I have a problem which I and a friend here have been trying to solve for some days now.

¿what is your problem?

After we have run in terminal "./configure" ; "make" & "sudo make install" and afterwards try to run radius with "radiusd -X" (same as freeradius -X if youre using freeradius installed through "Synaptic Package Manager").

and when you run in debug mode??
 
You can try this howto that works fine http://www.linuxinsight.com/building-debian-freeradius-package-with-eap-tls-ttls-peap-support.html