PXE boot yast auto installation

Hi,

currently I am interested in performing auto installation of clients which boot via pxe.
I already have a working dhcp and tftp server and my clients boot.

I downloaded initrds and kernel which are described in the following articles: 1 2
According to the pxelinux.cfg/default setting the client boot and loads kernel and then initrd and then initrc. I would like to provide automatic installation by using an autoyast.xml file.
I tried an example autoyast.xml file from the suse online tutorial.

<?xml version=“1.0”?>
<!DOCTYPE profile>
<profile
xmlns=“http://www.suse.com/1.0/yast2ns
xmlns:config=“http://www.suse.com/1.0/configns”>
<partitioning config:type=“list”>
<drive>
<device>/dev/sda</device>
<partitions config:type=“list”>
<partition>
<filesystem config:type=“symbol”>btrfs</filesystem>
<size>10G</size>
<mount>/</mount>
</partition>
<partition>
<filesystem config:type=“symbol”>xfs</filesystem>
<size>120G</size>
<mount>/data</mount>
</partition>
</partitions>
</drive>
</partitioning>
<scripts>
<pre-scripts>
<script>
<interpreter>shell</interpreter>
<filename>start.sh</filename>
<source>
<![CDATA[
#!/bin/sh
echo “Starting installation”
exit 0

]]>

    &lt;/source&gt;
  &lt;/script&gt;
&lt;/pre-scripts&gt;

</scripts>
</profile>

Nothing special, only to test if this changes the behaviour of the installation process.
Unfortunately nothing happends whether i use the the kernel and initrd described in article 1 or 2
I also tried using a template of kiwi but had no success as no kernel is available after building the template (e.g /usr/share/kiwi/image/netboot/suse-leap42.1, i already created a thread here)

For article 2 and the life-64 edu version my pxlinux.cfg/default has the following structure

DEFAULT KIWI-Boot

LABEL KIWI-Boot
kernel boot/linux-life64
append initrd=boot/initrd-life64 isofrom_device=nfs:192.168.250.23:/srv/nfs/ isofrom_system=/openSUSE-Edu-li-f-e.x86_64-42.1.1.iso autoyast=nfs:192.168.250.23:/srv/nfs/autoyast.xml
IPAPPEND 2

LABEL Local-Boot
localboot 0

Can you give me a hint what is wrong here?