Symfony plugin: call to undefined function 'enablePlugins'

I'm trying to install sfMediaBrowserPlugin ( http://www.symfony-project.org/plugins/sfMediaBrows开发者_如何转开发erPlugin/0_2_01?tab=plugin_readme ).

When running 'symfony plugin:publish-assets', it says that the ProjectConfiguration::enablePlugins() method is undefined.

How could I solve this? Thanks!..

By the way: I have a symfony 1.1.6 project with Propel.

As listed on the plugin page, you need at least symfony 1.2.