I cannot access your site as I get a security certificate error which blocks it
The custom Logo can appear in various places.
To see it in the header area:
Customizing > Visibility > Header Area > Hide site logo > Do not hide
To see it on the menu
Customizing > Layout > Menus > Add Site logo to the left
To replace the site title with the logo
Customizing > Images > Header Image Layout > Site Logo > Replace Title with Logo
Decide where you want it, then explain which one you chose and post back