Menu e css

[Ashry]

Salve a tutti,
avrei bisogno di sistemare graficamente un menu utilizzando i CSS, purtroppo di .net non ne so nulla e non riesco a capire come devo fare per mettere uno sfondo al menu
CSS:

.Menu2{background-image:url(../_images/menuBg.gif);
background-repeat:repeat-x;
background-position:top left; 
background-color:Transparent;
height:50px;
color: White;}

.level1{background-image:url(../_images/level1Bg.gif);
background-repeat:repeat-x;
background-position:top left; 
background-color:Transparent;
height:50px;
color: White;
}

.level2{
        height:50px;
        padding:0px;
        margin:0px;
        }

.level3{background-image:url(../_images/level1Bg.gif);
        background-repeat:no-repeat;
        background-position:top left; 
        background-color:Transparent;
        height:50px;
        padding:0px;
        margin:0px;
        
}
.Menu2 A:link, A:visited, A:hover{ color:#FFFFFF;
                text-decoration:none;
                vertical-align:middle;
                font-family: Helvetica, Arial, sans-serif;
                text-transform:uppercase;
                font-weight:bold;
                } 

.NET

<asp:Menu ID="Menu1" runat="server" DataSourceID="XmlDataSource1" 
                                MaximumDynamicDisplayLevels="4" 
                                StaticDisplayLevels="2"
                                DynamicVerticalOffset="1"
                                Orientation="Horizontal" 
                                OnMenuItemDataBound="Menu1_MenuItemDataBound"
                                CssClass="Menu2"
                                >
                                <LevelMenuItemStyles>
                                    <asp:MenuItemStyle CssClass="level1"/>
                                    <asp:MenuItemStyle CssClass="level2"/>
                                    <asp:MenuItemStyle CssClass="level3" />
                                  </LevelMenuItemStyles>
                             <DataBindings>
                                ...
                            </DataBindings>
                        </asp:Menu> 

però cosi mi viene fupri una cosa assurda tipo sfondo dentro sfondo :master:
inoltre non riesco ad eliminare lo sfondo bianco del subMenu
potreste spiegarmi come funziona?

Grazie