Do you use a proxy server? If so, this configuration option was added to the Task Pane in SP1. Find it in the Options of the Task Pane under Task Pane Management.

>Ya I got MSXML 4.0 SP 2. I'm begining to think that the evil system-administator here has it blocked...
>
>>Do you have MSXML 4.0 installed?
>>
>>Just a guess.
>>
>>Richard