[xwiki-users] java.lang.ClassCastException: com.xpn.xwiki.doc.XWikiAttachment cannot be cast to com.xpn.xwiki.api.Attachment

I'm writing custom listener to send e-mail after document updates according to: http://platform.xwiki.org/xwiki/bin/view/DevGuide/GroovyNotificationTutorial and: http://xwiki.475771.n2.nabble.com/Send-an-email-in-an-event-listener-td7579… Although adding attachment is working in Velocity as described in: http://extensions.xwiki.org/xwiki/bin/view/Extension/Mail+Sender+Plugin Similar approach in Groovy raises exception: java.lang.ClassCastException: com.xpn.xwiki.doc.XWikiAttachment cannot be cast to com.xpn.xwiki.api.Attachment at com.xpn.xwiki.plugin.mailsender.MailSenderPlugin.createMimeMultipart(MailSenderPlugin.java:391) ~[xwiki-platform-mailsender-4.5.jar:na] at com.xpn.xwiki.plugin.mailsender.MailSenderPlugin.createMimeMessage(MailSenderPlugin.java:327) ~[xwiki-platform-mailsender-4.5.jar:na] at com.xpn.xwiki.plugin.mailsender.MailSenderPlugin.sendMails(MailSenderPlugin.java:726) ~[xwiki-platform-mailsender-4.5.jar:na] at com.xpn.xwiki.plugin.mailsender.MailSenderPlugin.sendMail(MailSenderPlugin.java:673) ~[xwiki-platform-mailsender-4.5.jar:na] at com.xpn.xwiki.plugin.mailsender.MailSenderPlugin.sendMail(MailSenderPlugin.java:659) ~[xwiki-platform-mailsender-4.5.jar:na] at com.xpn.xwiki.plugin.mailsender.MailSenderPluginApi.sendMail(MailSenderPluginApi.java:171) [xwiki-platform-mailsender-4.5.jar:na] at com.xpn.xwiki.plugin.mailsender.MailSenderPluginApi.sendTextMessage(MailSenderPluginApi.java:98) [xwiki-platform-mailsender-4.5.jar:na] at com.xpn.xwiki.plugin.mailsender.MailSender $sendTextMessage.call(Unknown Source) [xwiki-platform-mailsender-4.5.jar:na] at EmailSenderListener.onEvent(Script22.groovy:34) [script:na] ... and line is: def attachments = source.getAttachmentList() What should I do? Thanks! Valdis