This text is for MS Windows only.
The JobScheduler need a 32 bit Version of a java virtual machine (jvm.dll) to run.
To determine where the location of this file is, JobScheduler get the active java version from the Windows registry:
HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment\CurrentVersion
This version contains the key RuntimeLib which will determine the location of the JVM used by JobScheduler (e.g. HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment\1.6.0_16\RuntimeLib).
You can use a different JVM specifying the option vm in section java in the configuration file ./config/sos.ini.
Example:
... [java] vm = C:\Program Files (x86)\Java\jre6\bin\client\jvm.dll ...
Normally you have to set this property if your JobScheduler should run on a 64bit machine.