AB&R 11.5 and FTP / SFTP errors

Hi,

just installed B&R 11.5 on a Windows Server 2012 machine (at Hetzner) and would like to backup directly to the backup location provided by Hetzner via FTP or SFTP.

Unfortunately I get errors.

When I try via FTP, I get this:
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Log Entry Details
--------------------
Type: Error
Date and time: 15.10.2013 09:13:57
Backup plan: Backup 15.10.2013 08:45:18
Task: Simple backup
Code: 20.250.685(0x135003D)
Module: 309
Owner: xxxxxxxxxxxxxxxxxxxxxx
Message:
Command 'Running backup plan 'Backup 15.10.2013 08:45:18'' has failed.
Additional info:
--------------------
Error code: 61
Module: 309
LineInfo: 4a8728dc8a1c950f
Fields: $module : mms_vs_37975
Message: Command 'Running backup plan 'Backup 15.10.2013 08:45:18'' has failed.
--------------------
Error code: 41
Module: 307
LineInfo: e6792a5ee190dda6
Fields: $module : agent_protection_addon_vs_37975
Message: ProtectCommand: Failed to execute the command.
--------------------
Error code: 640
Module: 64
LineInfo: a1d3981537c68767
Fields: $module : disk_bundle_vs_37975
Message: Failed to open the metadata directory.
--------------------
Error code: 46
Module: 64
LineInfo: 91e4c52610c9194
Fields: path : ftp://xxxxxxxxxxxxxxxxx/, $module : disk_bundle_vs_37975
Message: Failed to open the backup location.
--------------------
Error code: 20
Module: 4
LineInfo: 31813f5926d10e2e
Fields: $module : disk_bundle_vs_37975
Message: Access to the file is denied.
--------------------
Acronis Knowledge Base: http://kb.acronis.com/errorcode/

Event code: 0x0135003D+0x01330029+0x00400280+0x0040002E+0x00040014

----------------------------------------------------------------

I run the backup with the account details of a special user account that matches the ftp login details (as advised by Hetzner). Interestingly B&R is able to access the backup location, lists its content and writes backup files (1.9 GB each). Since there was no ".meta" subdir, after the first try I created one manually, but the backup failed with the same result.

When I try to backup via SFTP I get different error messages:

--------------------
Log Entry Details
--------------------
Type: Error
Date and time: 14.10.2013 11:10:14
Backup plan: Backup 14.10.2013 10:51:22
Task: Simple backup
Code: 20.250.685(0x135003D)
Module: 309
Owner: xxxxxxxxxxxxxxxxxxxxxxx
Message:
Command 'Running backup plan 'Backup 14.10.2013 10:51:22'' has failed.
Additional info:
--------------------
Error code: 61
Module: 309
LineInfo: 4a8728dc8a1c950f
Fields: $module : mms_vs_37975
Message: Command 'Running backup plan 'Backup 14.10.2013 10:51:22'' has failed.
--------------------
Error code: 41
Module: 307
LineInfo: e6792a5ee190dda6
Fields: $module : agent_protection_addon_vs_37975
Message: ProtectCommand: Failed to execute the command.
--------------------
Error code: 3
Module: 329
LineInfo: 1cd98aae889424f9
Fields: $module : disk_bundle_vs_37975
Message: Backup has failed.
--------------------
Error code: 1060
Module: 1
LineInfo: b43e776571144dec
Fields: $module : disk_bundle_vs_37975
Message: Failed to commit operations.
--------------------
Error code: 4
Module: 7
LineInfo: 9d2de1f088cbc4d8
Fields: $module : disk_bundle_vs_37975
Message: Write error.
--------------------
Error code: 3
Module: 4
LineInfo: dac945fcdc8d83f4
Fields: $module : disk_bundle_vs_37975
Message: Error occurred while writing the file.
--------------------
Acronis Knowledge Base: http://kb.acronis.com/errorcode/

Event code: 0x0135003D+0x01330029+0x01490003+0x00010424+0x00070004+0x00040003

--------------------

A backup file had been created in the backup location though, but just one and it was only 3.9 GB.

Any clue how I could resolve this?

Thanks,
Stephan