>Michel has I said I don't know WWC bus ASP works the folloing way.
>if you say response.expires=-1 this will mean that this call has expired so if you do a call to the same asp page with the same url the call is made to the server again you can also put response.expires=5 this will meant that this call is valid for five minutes.
>What this is doing is telling IIS to creates an HTTP expires header indicating the time that this page will expires.

I did try on the server side to add that. It doesn't change anything.