Import Automation

Hi,
 
I want automate the container import whithin the homepage.
Indeed, I've got a zip file created by the "export" link on the
administration module, and I want import this zip file via a Servlet.
 
This above code try to import a content on my site's homepage, but
doesn't work and I can read this trace on the console :
    [org.apache.slide.util.logger] WARN - WARNING: No active transaction


	JahiaPage jp =
ServicesRegistry.getInstance().getJahiaPageService().lookupPage(1);
	ContentPage cp = ( ContentPage)jp.getContentPage() ;
	java.io.File f = new java.io.File
("R:\\import_export\\export_ContentContainer_5.zip") ;
	java.io.FileInputStream fis = new java.io.FileInputStream(f);

	org.jahia.services.importexport.ImportExportBaseService ie =
org.jahia.services.importexport.ImportExportBaseService.getInstance() ;

	ie.start() ;
	ie.importFile(cp,jData.getParamBean(), fis);
	ie.stop();

Thanks in advance