MainMenu does't work when module is on

The main menu disappears when I turn HOT Image Slider Here's a link of my site and see ...

www.bojna-srebrenica.net/knjiga-gostiju.html

I noticed that on this path missing files listed ...

/modules/mod_hot_image_slider/tmpl/style.css

div#nav ul li a {
background: url("../images/nav.png") no-repeat scroll 0 0 transparent;

Disable jquery in hot image slider

When I disable jQuery get only a black image, and the menu does not work again

I noticed when the fire bug style.css over Exclude the following line menu starts to work

div#nav ul li {
float: left;
height: 52px; (disable)
}

div#nav ul li a {
border: 0 none;
display: block;
height: 52px; (disable)
line-height: 52px; (disable)
text-indent: -9999px; (disable)
}

see for yourself, and tell me if I made ​​the right decision ...

div#nav ul li a {
background: url("../images/nav.png") no-repeat scroll 0 0 transparent; (missing files)
}

Modify that css entities like this:

#header-menu div#nav...

so just add #header-menu in front of css paths

I did what you said and now it works all ok, thank you ...

Before :

div#nav ul li {
float: left;
height: 52px; (disable)
}

After :

div#nav ul li #header-menu {
float: left;
height: 52px; (disable)
}

---

Before :

div#nav ul li a {
border: 0 none;
display: block;
height: 52px; (disable)
line-height: 52px; (disable)
text-indent: -9999px; (disable)
}

After :

div#nav ul li a #header-menu {
border: 0 none;
display: block;
height: 52px; (disable)
line-height: 52px; (disable)
text-indent: -9999px; (disable)
}

opposite, first #header-menu