[jboss-as7-dev] problem creating datasources

Please see the following sequence of commands. It seems that the driver is created, also the second operation returns a "failed" status. [localhost:9999 /] /profile=default/subsystem=datasources/jdbc-driver=hypersonic:add(driver="com.h2database.h2") { "outcome" => "failed", "result" => {"server-groups" => {"main-server-group" => { "server-one" => { "host" => "local", "response" => { "outcome" => "failed", "failure-description" => "org.jboss.msc.service.DuplicateServiceException: Service jboss.jdbc-driver.\"org.h2.Driver\".1.2 is already registered" } }, "server-two" => { "host" => "local", "response" => { "outcome" => "failed", "failure-description" => "org.jboss.msc.service.DuplicateServiceException: Service jboss.jdbc-driver.\"org.h2.Driver\".1.2 is already registered" } } }}}, "failure-description" => "Operation was not applied successfully to any servers" } [localhost:9999 /] /profile=default/subsystem=datasources/jdbc-driver=hypersonic:add(driver="hypersonic-jdbc-driver") { "outcome" => "failed", "result" => {"domain-failure-description" => [("java.lang.IllegalStateException" => "Resource at address [ (\"profile\" => \"default\"), (\"subsystem\" => \"datasources\"), (\"jdbc-driver\" => \"hypersonic\") ] already exists")]} } [localhost:9999 /] /profile=default/subsystem=datasources:read-children-names(child-type=jdbc-driver) { "outcome" => "success", "result" => [ "com.h2database.h2", "hypersonic" ], "compensating-operation" => undefined }