I followed this website：A Beginner’s Guide to pgRouting and now facing some problems.
I finished steps before "Creating a routable road network", and open QGIS 1.8, click the PostGIS Manager plugin, here's the figure：, the first question is that how to enable PostGIS support？
And if I click the Data button trying to load data from shapefile, here's the figure：
And when I try either way：back to QGIS menu->click the Database->shp to postgis->key in my password->click connect, then it shows：
How to solve these problem and correctly use pgrouting？
ps.I work under windows7 64-bit, and have QGIS1.8, postgres8.4, pgadmin3, postgis2.0 installed.