RuntimeError: Could not load map file: File does not exist of '/root/svn.openstreetmap.org/applications/rendering/mapnik/osm-local.xml'

Hi, I am trying to Building Tiles with PostGIS OpenStreetMap data and Mapnik. I followed http://www.bostongis.com/PrinterFriendly.aspx?content_name=generating_osm_tiles

As I want to generate for Boston, I have created generate_tiles_boston.py

So when I run generate_tiles_boston.py script, I faced following error :

/usr/lib/pymodules/python2.7/mapnik2/init.py:27: DeprecationWarning: mapnik2 module has been deprecated,

    please use 'import mapnik'

warnings.warn(msg, DeprecationWarning)

render_tiles( (-71.2, 42.23, -70.99, 42.4) /root/svn.openstreetmap.org/applications/rendering/mapnik/osm-local.xml /root/osm/tiles/ 10 17 Boston )

Traceback (most recent call last):

File "./generate_tiles_boston.py", line 215, in <module> render_tiles(bbox, mapfile, tile_dir, 10, 17, "Boston")

File "./generate_tiles_boston.py", line 136, in render_tiles renderer = RenderThread(tile_dir, mapfile, queue, printLock, maxZoom)

File "./generate_tiles_boston.py", line 64, in init mapnik.load_map(self.m, mapfile, True)

RuntimeError: Could not load map file: File does not exist of '/root/svn.openstreetmap.org/applications/rendering/mapnik/osm-local.xml'

Any help would be kindly appreciated.