RE: Can't Access Enabled Administrator Account

> Hello, I'm running Vista Beta 2 Build 5472 and I have enabled the built-in
> Administrator account in Computer Management. When I boot to safe mode and
> select the Administrator account, however, I get the error message "The user
> name or password is incorrect". This Administrator account shouldn't have a
> password, so why am I getting this error and how can I get around it?
>
> My steps are exactly as follows: 1) I boot to safe mode, 2) I get the logon
> screen with Administrator and Other User options, 3) I select Administrator
> and see the enlarged user picture and the password field, 4) I leave the
> password blank and select the blue --> enter arrow, 5) The Welcome loading
> icon shows for a second or two and then the error message appears.
>
> Any help is much appreciated