updating to CVS head

I have an existing copy of freetds that I installed on Ubuntu Server
without difficulty using the instructions here:
http://www.pauldeden.com/2008/12/how-to-setup-pyodbc-to-connect-to-mssql.html.
 However, there is a bug fix in one of the most recent nightly builds
that I need.  The problem is that I can't seem to get the current
version installed so that my system will use it.

I tried:

apt-get install freetds-dev


but received the following message:

freetds-dev is already the newest version.


I then went to ftp://ibiblio.unc.edu/pub/Linux/ALPHA/freetds/current/freetds-current.tgz
and downloaded the nightly build.  I followed the instructions from
here: http://it.toolbox.com/wiki/index.php/Ubuntu_Debian_FreeTDS_ODBC,
nearly to the letter.  Everything seemed to go smoothly.  However, it
didn't seem to use the new version.  So I then tried uninstalling the
original installation using apt-get:

sudo apt-get --purge remove freetds-dev

This seemed to have little effect (the file /etc/freetds/freetds.conf
file still exists, for example), except that running it a second time
produced this message:

Package freetds-dev is not installed, so not removed


I have tried so many different things I've lost track of where I am.
Any help would be greatly appreciated.

-Mike