Prices on product not showing with VAT

-- url of the page with the problem -- : http://http://tuenni.ch (you have to be logged to see the shop, it is under construction, I could give a user/password for it in a email)
-- HikaShop version -- : 2.3.0
-- Joomla version -- : 2.5.19
-- PHP version -- : 5.3.25
-- Browser(s) name and version -- : Firefox 28
-- Error-message(debug-mod must be tuned on) -- : Error_message

despite the FAQ, the Forum I didn't find the answer.
I just want that on the product the prices are directly shown with the VAT included.
In the main configuration I set "with tax", the main tax zone the the whole country (Switzerland), and in the product I set the product tax category on default tax category. Each product has 2 characteristics with 2 values, in the whole 4 different prices.
I can switch between the characteristics, but the prices are always shown without VAT.
After trying an afternoon, I now quite perplex...

Hello,
If you have set the "Show taxed prices" to with tax through "Hikashop->System->Configuration->Main" your price should be showing with tax.
Also where do you have that issue ? on a product page or on your product listing page ?

Yes, I get this issue on the on the product listing respctively

on the product page itself.
in the attachment the main configuration.

Ok,
So if you are having that issue on the product listing can you :
- Go to your product listing content menu/module configuration page through "Hikashop->Display->Content menus/modules"
- Set the "Show taxed prices" to with tax

sorry that I answering only now. the last answer didn't resolve the problem.

What is strange is, it doesn't matter what I do, only the prices without the taxes are shown, everywhere, very consequently.
Also in the basket, only the prices without the taxes are shown, the taxes are not even mentioned.

just help to find out faster:

this product has 4 variants, the type of wood and delivery art.
here the variants page in the backend:

Help! help!
since 5 days I didn't get an answer, and his problem hast to resolved quickly now. I shows many snapshot, offered to give an admin access...

what more can I do ?

I would great to get an answer which bring me further.
Thanks.

I think found the problem...

my test account was with an address in Germany, the shop in Switzerland, the taxes only for Switzerland.
So I created a new text account. When I put the product in the basket, the address is automatically asked, I put this time a swiss address, I now the prices are shown with and without taxes...

The only problem is the prices with taxes are calculated the prices without taxes and are not rounded, 2 669,76 CHF instead 2700 CHF

yes, great thank you!