[TYPO3-shop] Problem displaying categories and products

[Blaž Smolnikar]

Hi,

I have typo3 4.1.6 and tt_products 2.5.5. I have created sys folder for 
products and categories. then I have added some categories and some 
products. Now I have created a web page for displaying shop categories 
that are in sys folder (I have choose shop module as content element and 
then choose display mode as Categories: List. Starting point is sys 
folder where are categories and products).

In TS I have some configurations for tt_products:
plugin.tt_products {
   templateFile = 
fileadmin/templates/tt_products/shop_template-css-slo.tmpl  --> This is 
my translated tpl
}

Now I expect that I will get on page listed categories but I get blank 
page, no categories.

What did I do wrong?

I also have installed  mbi_products_categories extension which version 
is 0.1.1. I have also installed all required extensions, like xaJax, etc.

The same story is also for displaying products...

Any help would be appreciated

Best regards