Debian lenny with freeradius 2.1.4/2.1.5 sql module fail.

[piston]

IBM x3550 server install Debian lenny.

Download freeradius from ftp://ftp.freeradius.org/pub/freeradius/freeradius-server-2.1.4.tar.gz, compile and install.

Question:

1. freeradius -v showing freeradius 2.1.5, was this correct?

2. trying to using mysql as database, ucomment sql in site-available/default, running debug mode got such error
/etc/freeradius/sites-enabled/default[152]: Failed to find module "sql".
/etc/freeradius/sites-enabled/default[62]: Errors parsing authorize section.

3. On the same server download, compile & install freeradius 2.1.3 with mysql, no problem. What could be the problem on the version 2.1.4/2.1.5?

Thank you