HTTP Installationsource using Port other than 80????

Hi, I am using sles9 and i am trying to install via http port 8080. But it seems that it does not pick up the port. It gets the xml file but it cannot connet to the installationserver on port 8080 What`s wrong? Do I need a patch or something like that? My isolinux.cfg looks like that: label http kernel linux append initrd=initrd autoyast=http://IP:8080/workstation/autoyast/profile/autoinst.xml UseDHCP=1 Install=http://IP:8080/autoyast/ Please help me!!!! Thanks. Stefanie