B1if XML to Sale order

Hi experts,

I'm trying to create a simple interface that will take xml file and convert it to Sale order.

I attached my atom0.xsl and the xml file I'm trying to insert.

Right now its giving me error:

No scenario step (vBIU) assigned for step for sender system (SysId)

Does any one have a complete scenario for this?

Or for some other XML to BP,PO etc.. that I can learn from?

Thanks,

Assaf