Error in "Add to cart" (v1.2.2)

[lioncity]

Hi,

I installed the v1.2.2 default version, using the default theme.

When I click "Add to cart" in IE7, the "add to cart" animation can not be seen, at the same time there is an error message (In admin, the setting "Ajax cart" is Enabled.):

Line: 175
Char: 5
Error: 'jQuery.iUtil" is null or not an object
URL: http://www....../product.php?id_product=7

Please kindly advise how solve this problem, thank you.

Best regards,
lioncity