Can not install Nominatim. How do I fix it? [Solved] [closed]

I download OSM map into postgresql.

It is all correct. Today I install Nominatim.

http://wiki.openstreetmap.org/wiki/Nominatim/Installation

I stop on the step: ./utils/setup.php –osm-file –all [--osm2pgsql-cache 18000]

~/src/Nominatim-2.1/utils/setup.php --osm-file /home/oleg/tmp/Russia/RU.osm.pbf --all --osm2pgsql-cache 12000

ERROR: DB Error: extension not found
DB Error: extension not found

I install DB (sudo pear install DB). I do not know where is error…

The answer

The problem is solved:

https://lists.openstreetmap.org/pipermail/geocoding/2013-October/001000.html