Errors from autoyast SLES8

hi everybody, i must install SLES8 on 20 maschines.So far so good.For this goal i've been made a http repository on my server (see http://www.suse.de/~nashif/autoinstall/multiplesource.html) for about 3 times. Each time if i want to install SLES8 (without SP3) i get this erorr from yast "error while configuring software selections". My xml file is OK (checked by tidy) and installation from cdrom as repository (install=cdrom, autoyast=floppy:///sles8.xml) works fine... Could anyone explain me what's wrong with my network repository ? Thanks a lot Martin Stefan