can't install new modules after updating python

[lie]

I've updated from python 2.5 to 2.6 on my Slackware 12.2, by compiling
the 2.6 source. When I try to use slapt-get to install a new module
for python, it installs in the old version, and I can't use it. How
can I fix this? Should I go back to 2.5?