[TYPO3] Menu Active state

[rupali.ffm at googlemail.com]

Hello List,
http://serviceforce.duke2007.taunus.de/index.php?id=35&L=1
in the Servicemenu (home, kontakt, anfahrt etc..)at the top of the site, the
active menu item has a arrow in front...everything works fyn but its not
working for menuitem-home..its a shortcut to main menu-unternehmen. ´why?
TS:
##Service Menu [Begin]
lib.service_nav= HMENU
lib.service_nav{

  special = directory
  special.value = 31
   1 = TMENU
   1{
   expAll = 1

   wrap =<ul id ="top_nav_ul">|</ul>
   noBlur = 1

   NO {
    allWrap =<li>|</li>
   }

   RO < .NO
   RO {
      allWrap =<li>|</li>
   }
   RO = 1

   CUR< .NO
   CUR{
    allWrap =<li>|</li>
    ATagParams = class="current_menu"
   }
   CUR= 1
   }
  }
##Service Menu [endet]
I also tried ACT inplace of CUR...:(

Rupali