Strange language bug in opencart

Hi,

I am using opencart 1.5.5.1 hosted by Arvixe.Here is my url: http://eastcenter.net/

When I test the language module in the website,I find a strange bug.I install 2 language modules in my opencart,English as default and Chinese.However,when I want to change the language in the front page by clicking the national flag on the top of page,I find I need to click by 2 times instead of 1 times to change it.

I am not sure why I need to click by 2 times to change the language.

Thank U for help.

First off thanks for hosting with us .

Whilst playing with your website I found I only needed to click on the language flags once and not twice which switched between the languages without problems.

To see what is causing the issue for you what browser are you using (+ version) & what operating system?

Chrome 27 on Windows Vista.But it seems that IE 8 will also cause this problem.