TPM Problem with Intel DQ965GF

Intel DQ965GF
Latest BIOS 5882
OS: Vista X64 Ultimate
TPM: ST Microelectronics 1.2

When I disable Bitlocker and want to reactive it I get an error.
All I can is to decrypt and recrypt the disk which is very time consuming.
Updating to latest BIOS Version didn't help.
Is this a known bug?

Bug or feature:?
I don't see the TPM device in the device manager with the Intel Motherboard.
But I saw it in a Lenovo Notebook.
Further I can't open the TPM Management on local Computer when Bitlocker is
enabled.



C:\Windows\system32>cscript manage-bde.wsf -status
Microsoft (R) Windows Script Host Version 5.7
Copyright (C) Microsoft Corporation. All rights reserved.

Disk volumes that can be protected with
BitLocker Drive Encryption:
Volume C: []
[OS Volume]

Size: 23.44 GB
Conversion Status: Fully Encrypted
Percentage Encrypted: 100%
Encryption Method: AES 128 with Diffuser
Protection Status: Protection On
Lock Status: Unlocked
Key Protectors:
External Key
Numerical Password
TPM And PIN


C:\Windows\system32>cscript manage-bde.wsf -protectors -disable c:
Microsoft (R) Windows Script Host Version 5.7
Copyright (C) Microsoft Corporation. All rights reserved.

Key protectors are disabled for volume C:.

C:\Windows\system32>cscript manage-bde.wsf -protectors -enable c:


ERROR: An error occurred while enabling the key protectors. (code 0x80284008)