[xwiki-users] a velocity problem

Hello, now I have this scenario: I’d like to use a page(which includes some velocity macros) in another new page, I use the snippet below in my new page: {{velocity}} #set($reference = $services.model.createDocumentReference('', 'API', 'InterfaceDocTemplate')) #set($document = $xwiki.getDocument($reference)) $xwiki.getDocument($document).getContent() {{/velocity}} but it turns out that the velocity macros cannot be executed, and the alert is “Failed to execute the [velocity] macro”. I would greatly appreciate if someone could give me a solution. Excuse my poor English please, thank you very much!