I apollogize for the late response, I have been very busy and I couldn't keep working on this.
I found the problem! (at least it works now) I installed Freeradius from PPA. https://launchpad.net/~freeradius/+archive/stable DHCP functionality not work when installed from PPA, or at least the package version 2.2.0 + dfsg-ppa10 not work. Reason: installed and configured without errors, seems to respond correctly OFFER and ACK but this packets never leaves the network adapter. SOLUTION: install and configure from sources. I'm writing a how-to for setting freeradius as DHCP server, completely from scratch, for static IP allocation, with DHCP options and using Mysql. If you allow me, i'd like to post it in this mailing list for you to test and correct it. Thanks! - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html