I installed the YJ Portfolio theme and also YJ MEga Menu.
When enter in the theme, it asked me to enable plugin.
When I enable plugin, the site won´t open and gives me a HTTP 500 error.
If you need aditional info, just ask me.
Are you sure your are posting in product assigned forum?
What is your CMS version?
: Joomla 1.7
Link to installation
: O Criador da Realidade - A Vida dos Seus Sonhos é Possível
Have you edited any files? If yes tell us which ones.