Hello. I'm having an issue: I can't deploy an EAR to a remote WebSphere, I'm getting this error:

Connecting to IBM WebSphere Application Server...
The following artifacts will be deployed in this order...
-------------------------------------------
facturador-ear-1.0.30.ear
-------------------------------------------
FATAL: Implementing class
java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at org.apache.tools.ant.AntClassLoader.defineClassFromData(AntClassLoader.java:1128)
at hudson.ClassicPluginStrategy$AntClassLoader2.defineClassFromData(ClassicPluginStrategy.java:704)
at org.apache.tools.ant.AntClassLoader.getClassFromStream(AntClassLoader.java:1299)
at org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1355)
at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1315)
at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1068)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at org.apache.tools.ant.AntClassLoader.defineClassFromData(AntClassLoader.java:1128)
at hudson.ClassicPluginStrategy$AntClassLoader2.defineClassFromData(ClassicPluginStrategy.java:704)
at org.apache.tools.ant.AntClassLoader.getClassFromStream(AntClassLoader.java:1299)
at org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1355)
at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1315)
at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1068)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at com.ibm.ws.amm.commonarchive.AnnotationsProcessorImpl.merge(AnnotationsProcessorImpl.java:70)
at org.eclipse.jst.j2ee.commonarchivecore.internal.impl.WARFileImpl.processAnnotations(WARFileImpl.java:302)
at org.eclipse.jst.j2ee.commonarchivecore.internal.impl.WARFileImpl.getDeploymentDescriptor(WARFileImpl.java:248)
at org.eclipse.jst.j2ee.commonarchivecore.internal.impl.WARFileImpl.getDeploymentDescriptor(WARFileImpl.java:178)
at com.ibm.websphere.management.application.AppDeploymentUtil.getModuleVersion(AppDeploymentUtil.java:1458)
at com.ibm.websphere.management.application.AppDeploymentUtil.isEE5SchemaDD(AppDeploymentUtil.java:1419)
at com.ibm.ws.management.application.client.AppInstallHelper.checkIfEE5ModulesContainXMIBindings(AppInstallHelper.java:1098)
at com.ibm.ws.management.application.client.AppInstallHelper.checkIfEE5ModulesContainXMIBindings(AppInstallHelper.java:1063)
at com.ibm.ws.management.application.client.AppInstallHelper.checkForEE5Restrictions(AppInstallHelper.java:324)
at com.ibm.ws.management.application.client.AppInstallHelper.getAppDeploymentInfo(AppInstallHelper.java:377)
at com.ibm.websphere.management.application.AppManagementFactory.readArchive(AppManagementFactory.java:100)
at com.ibm.websphere.management.application.AppManagementFactory.readArchive(AppManagementFactory.java:70)
at com.ibm.websphere.management.application.client.AppDeploymentController.readArchive(AppDeploymentController.java:208)
at org.jenkinsci.plugins.websphere.services.deployment.WebSphereDeploymentService.getAppName(WebSphereDeploymentService.java:108)
at org.jenkinsci.plugins.websphere.services.deployment.WebSphereDeploymentService.getAppName(WebSphereDeploymentService.java:98)
at org.jenkinsci.plugins.websphere_deployer.WebSphereDeployerPlugin.getAppName(WebSphereDeployerPlugin.java:268)
at org.jenkinsci.plugins.websphere_deployer.WebSphereDeployerPlugin.createArtifact(WebSphereDeployerPlugin.java:226)
at org.jenkinsci.plugins.websphere_deployer.WebSphereDeployerPlugin.perform(WebSphereDeployerPlugin.java:168)
at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:45)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:785)
at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:757)
at hudson.model.Build$BuildExecution.post2(Build.java:183)
at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:706)
at hudson.model.Run.execute(Run.java:1703)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:231)

Analyzing the stack-trace, I see that the problem arrises when trying to find the appname. Somehow it's procesing EAR annotations and classloading issues appears.
Thanks!