Survey export to excel problems

Ok so what do when you have the following error : 'Sharepoint "Results to spreadsheet" results in Error: Unable to open ........ The Internet site reports that the item you requested could not be found. (HTTP/1.0 404)' Check whether the user is accessing the site via an anonymous + windows intergrated authentication or just pure windows integrated. Excel tries to access the site anonymously and therefore cannot open the survey. The case which I had this problem was one where we have a portal with teamsites both accessible as anonymous as windows intergrated. We use two urls for this scenario since Sharepoint Portal does not come with a sign-in button so defaultwise this url is only windows integrated. The other url is both windows intergrated and anonymous. Most users use this url to access their site and therefore had this problem. I had a hard time figuring this one out! :)