Bitlocker Drive Encryption on 5308?

Hello,

I have a Dell Latitude D610 with TPM chip enabled and one vmware
installation of 5308.

Bitlocker does not work on any of them. On D610 no tpm chip is found. Fine,
I'll just use USB drive instead so I launch Bitlocker Drive Encryption from
Control Panel. There I find that no volumes are found. Except on laptop
where only the d: drive is found, but I cannot activate it.

I've checked the Vista page, but the guide there does not give me any hint
for a solution. Tips anyone?

TIA

/Björn Johansson