Pls see  http://mngts.encumpus.com/Portals/138/image/submenuissue.jpg 

I tried reducing the width of the submenu but it doesnt work.. I also included display:none inside icon and arrow but still nothing happens..

My css for the menu is this :

.MainMenu_MenuContainer
{
 width:190px;
  height:22px;
}

.MainMenu_MenuBar {
    cursor: pointer;
    cursor: hand;
}

.MainMenu_MenuItem
{
    cursor: pointer;
    color: #0F3C1D;
    font-family: Arial, Tahoma;
 padding-left: 4pt;
   background-image: url(menu.jpg);
    font-size: 13px;
    font-weight: bold;
    font-style: normal;
  width:192px;
  height:22px;
}

.MainMenu_SubMenu {
    z-index: 1000;
    cursor: pointer;
  border:0;
  width:170px;
  height:22px;
    font-size: 13px;
     font-weight: bold;
    font-style: normal;
}

.MainMenu_MenuIcon
{
    display: none;
   border:0;
}

.MainMenu_MenuItemSel
{
    cursor: pointer;
    color: #ff5206;
    font-family: Arial, Tahoma;
    padding-left: 4pt;
    font-size: 13px;
  height:22px;
    font-weight: bold;
    font-style: normal;
 background-image: url(menuover.jpg);
}
.MainMenu_SubMenuItemSelected
{
    border: 0px;
 color: #000063;
}

.MainMenu_MenuArrow
{  
    display: none;
   border:0;
}

.MainMenu_MenuBreak {
 height: 0px;
}
.SelectedMenu
{
 color:#ffffff;
 text-decoration:none;
}