Create SDR for Small Business Server 2008

Hi,

I need to create the Simplified Disaster Recovery Disk on my SBS 2008 (SP2)

The Wizard tells me my System does not support ADK (Windows Assessment & Deployment Kit) although it is listet as compatible

http://origin-symwisedownload.symantec.com/library/BUSINESS/xCL/TECH217478/be_2014_scl.html#backup_exec_feature_specific_compatibility-simplified_disaster_recovery_sdr_

So I downloaded the Windows Assessment and Deployment Kit (Windows ADK) for Windows 8.1 Update (https://www.microsoft.com/de-DE/download/details.aspx?id=39982) and installed it myself.

I selected the Deployment Tools and Windows PE but Symantec Backup Exec 2014 (14.1 Rec. 1786) still says it can't find the ADK

Is there something wrong with my Version of the ADK?  I do not have another Server 2008R2 ready to create the Medium as the Wizard suggests