IE vs. XSL - Access denied error

> Hi all,
> 
> I've noticed this problem was discussed here before but there is something
> I don't understand.
> 
> I have XML file and style sheet processing instruction referring XSL on
> www. I have XML file as attachment in MS Outlook. When I try to open it I
> get "Access denied" error from IE (5.5). But when I save file into
> directory and open it everything is ok. Even when I navigate to MS Outlook
> temporary directory and try to open it I get error. When I move file to
> different directory it works again. What's the problem? If it is IE
> security it would not work at both cases, right? Thank you
> 
> Tomas

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