Synology iSCSI Windows install

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Hi Guys,

I am trying to install Windows on iSCSI but i am having some difficulties.
Normally i boot up winpe with ipxe and map a network share with the installer on it and boot up the setup.
When i attach a iSCSI in the ipxe script it freezes at entering bootmgr.exe with parameter....
This happens only when i use undoinly.kpxe, .kkpxe and kkkpxe.
When i use the .pxe variant it does not hang but reboots at the screen "Windows is loading files".
Tried it on different pieces of hardware with all the same result.
I am guessing there is something wrong my Synology or my script.
I use a DS214+ that contains a LUN and 1 Target with 50Gb of space.
Below the script that i use to attach the iSCSI and boot up winpe.

set gateway 192.168.10.1
set keep-san 1
sanhook iscsi:192.168.10.1::::iqn.2000-01.com.synology:NAS005.Server.daa0aebffd

kernel ${boot-url}/wimboot
initrd ${boot-url}/x86/boot31/bootmgr bootmgr
initrd ${boot-url}/x86/boot31/bcd BCD
initrd ${boot-url}/x86/boot31/boot.sdi boot.sdi
initrd ${boot-url}/x86/macrium.wim boot.wim
boot || goto failed
goto start

As i said without the iSCSI part winpe boots fine with no problems at all.
Hope you guys can help me out!