[Plugin: Woocommerce] Error message installing

Hi

I am getting the following error when I am trying to install Woocommerce in the local version of my website:
You do not have sufficient permissions to access this page.

I have searched for it, and I did what is explained in the following link with no positive results:
http://wordpress.org/support/topic/wp-admin-you-do-not-have-sufficient-permissions-to-access-this-page

What should I do? What’s the problem?

Thank you