My XPDL process is not loaded

This can have many reasons. Usually the package is invalidated because one of the XPDL specifications has been violated.

You can check the reason by using a logger framework as described in "Can I use a debugging framework with the platform?".

In Apache Chainsaw, you will most probably see something like this:

Level: ERROR
Logger: org.methexis.engine.persistence.memory.BasicProcessRepository
Message: Error processing XPDL file [...]\conf\wfe\processes\simpleDemo.xpdl

At the end of the message you can usually find the exception that occured.