Your username here MUST MATCH your XenForo username (connected to your XF license).

    Once you have registered here, then you need to start a conversation at xenforo.com w/Bob and provide the following:
    1. Your XenForo License Validation Token
    2. The Domain Name associated with the License
    NOTE: Your account will be validated once ALL requirements are verified/met. Thank you for your patience.

When I click I get the wrong skin

Showcase also has the ability to over ride the viewing users style and set a specific "style" per category, so check your category(s) to make sure you are not forcing a specific style.

Applications >> Showcase >> Category Management >> Category >> Category Options (6th option on that tab)