Price with tax not working

Hello
I have little problem with price display with tax.
When i want to display both prices i can't get to display price with tax.
When setting product price, the tax price is ok but I can't display it on product details.
I attached some screenhots...

Thank you for your help!

I did't have the latest joomla installation.
I have updated to 1.5.25

Thank you

I see that you activated the display of both "with VAT" and "without VAT" prices.
Since they are the same, it means that the system didn't find any VAT rules applying to the product for the default tax zone and default user type you set in the configuration.
So it's a problem of configuration of the taxes really.
You should look at that FAQ where we list all the possible cases for that problem:
www.hikashop.com/fr/support/documentatio...ion-listing.html#faq