Unable to configure DB binary store in JBoss AS 7.1.1

The JBoss AS7 configuration is not accepting the JNDI name for the "db-binary-store" section, claiming that the datasource jndi name is null. The output looks like this when attempting to set it from the CLI:

[standalone@localhost:9999 /] /subsystem=modeshape/repository=author_repository/configuration=binary-storage/storage-type=db-binary-storage:add(data-source-jndi-name=java:/DezideWebAuthor2DB)
{
    "outcome" => "failed",
    "failure-description" => "JBAS014746: data-source-jndi-name may not be null",
    "rolled-back" => true
}

I use the datasource in an Infinispan cache loader, so it is working (I've also tried stripping the "java:/" without success).