I upgraded hosts and Vcenter to 6 and also VDDK to 6. this is error. what's going on?

================================= LOG START ==================================
Thinware(R) vBackup(R)
Version: 4.0.0.2708 (Version 4.0)
Copyright (c) 2009-2014 Thinware, Inc. All rights reserved.
Visit us at: www.vbackup.com-
Process Started: 4/18/2015 7:21:25 AM
Application Settings:
- SMTP Server = 10.63.14.77:25
- SMTP Username =
- SMTP Password =
- SMTP From Address = padair@xxx
- Notification Recipients = padair@xxx
- VMware Virtual Disk Development Kit Install Path = C:\Program Files\VMware\VDDK
Execution Arguments:
- Virtual Machine = PNT-LON-WEB1
- Server = vcenter.pnt.local:902
- Server Username = administrator@pnt.vcenter
- Server Password = ************
- Job = PNT-LON-WEB1 BACKUP
- Job Type = Backup-Image-VADP
- Backup Root = K:\
- Disk Exclusion = None
- Backups to Keep = 1
- Quiesce Guest File System = False
- Create Snapshot Task Timeout = 15
- Remove Snapshot Task Timeout = 15
- Encrypt Temporary Password File = False
- Compression Level = Advanced
- Maximum Log Size = 1024
- Backup Type = Image-Full
Server Platform: VMware vCenter Server 6.0.0 2559267
Virtual Machine Guest OS: Microsoft Windows Server 2012 (64-bit)
Host Server: vmware1.pnt.local
Host Server Platform: VMware ESXi 6.0.0 build-2494585
License:
- Type: Extended Trial
- Status: Active (Expires: 5/17/2015)
- Edition in Use: Professional
Backup Folder: K:\PNT-LON-WEB1
Backup: 150418_072200
No existing temporary snapshots found.
Temporary Snapshot: vBackup-TMP-150418_072200
VMware Virtual Disk Development Kit: VMware Virtual Disk Manager - build 2498720
VMware Virtual Disk Manager response for Hard disk 1: [ds1] PNT-LON-WEB1/PNT-LON-WEB1-000001.vmdk:
VixDiskLib: Invalid configuration file parameter. Failed to read configuration file.

Can't create connection.

E Unable to complete backup. Unable to verify successful transfer of virtual machine virtual disk file K:\PNT-LON-WEB1\150418_072200\PNT-LON-WEB1-000001.vmdk.
Temporary snapshot removed.
Backup data folder deleted in cleaning up after job failure.
Process Completed: 4/18/2015 7:22:06 AM
Elapsed Time: 41 seconds
Notification message sent to specified recipients (above)