Help - Nivo slider doesn't change pictures until you move a mouse

[Khaztech]

Nivo slider doesn't change pictures until you move a mouse or scroll down or manually change a picture in the slider.

Nivo slider ver.2.7

Prestashop 1.4.5.1

Jquery 1.4.2 (the default one in Prestashop)

 

Here is the problem:

http://mosaic.preview.khaztech.com

We аrе using everything the same but with earlier ver. of Prestashop (1.3.7.0) in different website:

http://gigglesplayland.com

 

Please advice...