Plugin installation error (Eclipse)

Hi!
Anyone, who is devoted Eclipse user can help me here, please?

Cannot complete the install because one or more required items could not be found.
  Software being installed: Vaadin Eclipse Integration 1.3.1.201012171040 (com.vaadin.integration.eclipse.feature.group 1.3.1.201012171040)
  Missing requirement: Vaadin Eclipse Integration 1.3.1.201012171040 (com.vaadin.integration.eclipse.feature.group 1.3.1.201012171040) requires 'org.eclipse.jst.j2ee.web 0.0.0' but it could not be found

Thanks!