After uninstaling the client und the studio (an deleting all Files depending to HANA in my personal directory) i terminated the instance on AWS.
I satrted from the begining.
Now i downloaded the client and the studio from this side:
http://scn.sap.com/docs/DOC-28294
After connecting my SAP Hana Studio with the Instance on AWS, the system needs a backup.
What i make wrong now ?