Additional info.
The software has a core module and a separate ejb module (openempi-ejb-2.0.5.jar), as you can see.
I'll try to attach the ejb configuration xml file of the Spring in the core module (applicationContext-ejb.xml) and the configuration file from the EJB module.
I totally can't understand the error message. It says it is already deployed. Who else can deploy it? How? Why?