Incorrect display rates when switching currencies in the basket

[panadina]

Found a problem on the Assembly Joomla 2.5.24 + VM 2.6.10, was downloaded from the website Virtuemart.net. When changing currency in the basket of goods is incorrectly listed the price for the goods. The price for the goods entered the base in USD, the display on the website in UAH at the rate of.
Example, 400 ₴ when you switch to the USD is shown as 40 ₴ , but if you press again the button to change the currency or F5, the display of prices will correct: $40. When switching on UAH, the situation is similar:each time you press the button to change the currency: $400, re- 400 ₴ . On the main page of the VM and the list of categories of goods - selection and switching exchange store is as expected-the price of the goods displayed correctly. Please help the visitors of this forum to solve this problem.

Plugin-payment standart
PHP 5.3
localhost