freebsd stable - Mar 2007 - python 2.4.4, 1 vs 2.4.3, 1 - zope trouble - python version downgrade

Yesterday I try to install a python module after a 'portsnap fetch
update', during the install python upgrade from version  2.4.3,1 to 2.4.4,1.

python-2.4.3,1   The "meta-port" for the stable version of Python
interprete
vs
python-2.4.4,1   [...]

since these upgrade my zope (zope29-2.9.6) won't start anymore !

How can I come back to version python-2.4.3,1 ?

Michel