When installing FusionReactor manually, you are required to create a FusionReactor directory and configure your application server to run the FusionReactor java arguments yourself.
Typically, if a manual installation fails the application server will not be able to start, but you can also be in a situation where FusionReactor is not available but your application is running.
In these situations you should do the following:
Check your application server logs for any errors on star-tup
Check that the FusionReactor directory is read writeable by the user running your application server
Check that the paths used in your JVM arguments are correct
Check that the port specified in your java arguments is not already in use