Load initrd hangs (SuSe 9.0)

Hi, We have set up an Installations Server for SuSe 9.0 as specified in the documentations of Anas Nashif. We have used original files from the SuSe 9.0 Pro distribution. I like to use it for a network install of SuS9.0 to a number of workstations. The client boots and PXE is startet und makes contact to a dhcp-Server. The it loads the linux kernel. But when its starts loading the raddisk it hangs: Loading initrd ... And the boot fails. We have now spent around over a week on this problem and are stuck now. Does anybody have a hint how to make this work. Thanks Dominic