A bug in activation?

As a MS TechNet Plus subscriber, I received the Beta Windows Vista Build
5270 in my February shipment.

No problem for installation with the key on the disc. The problem comes
after, during the activation.

In a first time, Vista activation runs perfectly fine and successful (VGA is
OK).

In a second time, about 2 hours after the activation, Vista appears to be
not activated and lets me 13 days to activate again.

When I run a new activation, the process hangs up and I got the following
error code 0x8007000D : "data is invalid".

I have reported this issue to TechNet Support (technet@eu.subservices.com).

They confirmed me by phone the key is right and does not need to be
replaced. So, my problem could be coming from bad internet connection
settings and they told me to search support on MS newsgroups.

I re-installed Vista three times and got the same issue. I have reported it
using Microsoft Beta Client but no answer at this time.

In the viewer, event ID in "Software Licensing Service" is 1010.

However, my connection works fine (ADSL ISP => Free IP/ADSL 10/1 mbs with
FreeBox router). I have no any access restriction on the web or in my
network. Windows update and Windows Defender update work fine too.

I don't understand.

Did somebody experience same issue to activate Vista and how to fix this
bug?

Thanks

Merzhin

Brittany - France