Hijacking this thread
Since it' been dead for a while, and it's exactly the problem I'm having, I'll pick up where it left off.
My situation is probably slightly different in that I installed FreeRADIUS on a machine that did not have mySQL on it. The reason is that I am keeping my db on another machine. However, when I enabled sql auth, I get pretty much the same errors he was getting.
I tried installing mySQL to see if there were just missing libraries, but that didn't work.
Can someone offer some help? (I'm not against saving my config files and starting over.)