It's unfortunate that you put HII in the title of this thread. This is nothing to do with HII. I don't know if there is a way to change it now, but some people who might otherwise be able to help may ignore this thread because they are not familiar with HII.
So the problem is a "remove all partitions" action failing. What happens when you run diskpart manually? Click to green Go button, open a new console, type diskpart and try the following commands:
select disk 0
sorry for the wrong title, changed it...
When I run the commands i get no errors and all works fine...
But why does the template doesn't work?
Sorry don't know why the template isn't working...
Try to determine if it's something with one specific template or a more general problem. Do other templates work or does provisioning simply not work at all for you? If you create a template with just that one action (remove all partitions), does it work then? Does the log on the core server tell you something (have a look at this article to enable more detailed logging).
I redeployed the pxe representative on the server and then the pxe boot and the clean partition command worked fine ^^