Word press configuration Help (WpCache)

I need a skilled Wordpress developer I am a junior PHP developer, and work with Wordpress from a year. I have the following problem: In one of my Wordpress installation: Ver. 2.21 Wp-cache plug-in doesn’t work; after install and configure fGallery plug-in. Note: inside fgallery pages, wp-cache works. I searched in Google, forums, tutorials without good results, I try to reinstall fgallery, I reinstalled Wordpress without success. I need a Wordpress guru that know how solve this issue. I will pay on success, I need someone to know how solve this, not a newbie. Note: My WP installation is in Spanish.