I tested the Gamebox template and the module position seems to be wrong, because it's not like in the graphic next to the logo. It's rather more over the breadcrumbs.
I tested it with gk weather and with other modules, and all doesn't work right.
I think this is not a "customization problem". I will only use a existing module position which is a feature of the template. I think that my problem is a bug in the template ...