[xwiki-users] newsletter extension doesn't work

Hello I tested newsletter extension 1.0.1 on xwiki 5.4.2 and 6.0RC1. http://extensions.xwiki.org/xwiki/bin/view/Extension/Newsletter+Application I followed the instruction, create instance but the scheduler doesn't send mail at users... (My user subscribe at my newsletter and xwiki.mailsender.sendHtmlMessage work well) On Xwiki 5.4.2 the scheduler doesn't lauch my test job but on 6.0RC1, the scheduler work well with this test job. Then, I copy/paste newsletter job code on another page (between {{groovy}}{{/groovy}}  and I obtain a lot of errors: <<Failed to execute the [groovy] macro org.xwiki.rendering.macro.MacroExecutionException: Failed to evaluate Script Macro for content [ etc...>> Any ideas of this problem? thxs Pascal B