Trying to use manage-bde to turn on bitlocker

Im trying to use "manage-bde" to turn on bitlocker but I get error below that TPM is off but it is on. I did it manually by just right clicking the c drive,enabling bitlocker and it works fine. Anybody have any suggestions on why this is happening?
I am not using SCCM.

C:\Windows\System32>manage-bde -on c: -RecoveryKey "\\server\bitlocker\b
BitLocker Drive Encryption: Configuration Tool version 6.1.7601
Copyright (C) Microsoft Corporation. All rights reserved.

Volume C: [System]
[OS Volume]
ERROR: The TPM cannot be used to protect this volume. The TPM is off.

Type "manage-bde -tpm -?" for more information on configuring the TPM.

Thomas NSystems Analyst - Windows System AdministratorAsked:
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Just do as the message advises, see what manage-bde -tpm -? has for you and what you can do with it. It could be that turning it on manually just implies some tpm commands, couldn't it?

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What kind and model of computer/
Is it enabled in BIOS?
Do you see this in Device manager?

tpm-1.2.jpgGood article at U Vermont:
Thomas NSystems Analyst - Windows System AdministratorAuthor Commented:
It was was on but not activated in bios
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