installed vista 64bit - when activating says product key is in use

hey
i have the retail business edition of vista. i just received my 64bit dvd in
the mail(ordered form microsoft website) and installed it. when i go to
activate it tells me my product key is in use

It is in use by your Vista86 version. Use the telephone option and stay on
the line if necessary to explain to the operator. If you have removed the
Vista86 version you should have no problems.

"toast" <toast@discussions.microsoft.com> wrote in message
news:B8F019DC-32C9-438A-9768-81791E2F941C@microsoft.com...
> hey
> i have the retail business edition of vista. i just received my 64bit dvd
> in
> the mail(ordered form microsoft website) and installed it. when i go to
> activate it tells me my product key is in use