Uploadify error

[birkoff]

did it work before you changed to the CZ language?
Are there any problems listed within your browser's console.log feature?
What browser are you using?

No, it is not work before i add CZ language. My primary browser is Chrome (dev version), but i tried to display the page also in FF4, FF5, IE8, IE9, Opera and Safari too. And the problem persist.
But yes, there is a error displayed in console, can you look at this?