At this point, the new BPMN editor is still using the old process engine, so not all BPMN elements are supported. The new BPMN engine which is currently under development will support executing BPMN process designs.
Please try out the new BPMN editor in our latest development release, which is available for download at the following locations:
http://sourceforge.net/projects/process ... z/download
Of course, this is "beta" software, so do NOT use it in production. If you encounter any bugs or have any suggestions to improve the BPMN editor, please file a report about it at http://bugs.processmaker.com