background of the menu item not showing

Hi I have purchased and installed Hot Sport Template in Joomla 1.5. My problem is that the bacground of my top menu items (user3 position) is empty, there is no background, no visualisation, no background image as we can see it in demo templates. i have installed this template on joomla 2.5 few days ago and there was no problem with it. You can check it in www.arsenalsouthslovakia.eu page. Can you please give me advice how to solve this?

Thx in advance

i found the answer in previous topi. the problem was that i forgot to set menu tag id as "nav", everything is working now.