Application Server Control of Oracle SAO Suite not reachable

When you install the Oracle SOA Suite (10.1.3.1) and navigate to the Enterprise Manager’s Application Server Control you will hit a 404 Page not found exception.Application Server Control has no routing relationship (see 10g3 New Features overview) with the Oracle HTTP Server by default. To establish this relationship you have to set the ohs-routing attribute to true (default false) in the default-web-site.xml file (/j2ee/home/config) of the home container:
Do not forget to restart the home container to let the changes take effect.