This KB perhaps?
http://support.microsoft.com/kb/947206
--
All the best,
SG
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"Urvin" <Urvin@discussions.microsoft.com> wrote in message
news:93F47167-CA52-4BFB-B4E8-9DC303A2ED8B@microsoft.com...
> Hi ,
>
> I am in a windows 2003 Domain and have the following problem when using
> remote assistance:
>
> I can offer remote assistance to all Xp workstations but not to any
> Windows
> Vista workstation. When I offer remote assistance to a windows Vista
> machine
> I receive an error stating that " your offer to help could not be sent".
>
> My Windows Vista workstations are running Windows Vista Enterprise Edition
> with SP1.
>
> Any idea what is causing this behavour?
>
>
> --
> Urvin
>