The environment where IronJacamar runs in defines the classloader, so inside AS7 that would be AS7 deployer processors.
What is your <admin-object> definitions in <resource-adapter> or in <ironjacamar> ? Are you running the latest build from master ?
I'll have James look at the exception. Thanks.
You should be using http://community.jboss.org/en/ironjacamar for these types of questions.