Thanks. But the IT-dep says that the qlikview-server don´t run IIS. But I have forwared the document and hope for som result. The strange thing is that it´s only one app that don´t work. If it were any problem with the IIS, then would´t any app work?
Yes, if it was a port issue would it effect all of the documents for that user. The QVS tunnel is a fail over function to use port 80 instead of the normal 4747 (if its blocked etc).
If I understood you correct do the users dont have have problem opening any other documents on the accesspoint? The first thing I would check is what plugin version they are using, and make sure that they update if they are using an older one. Have you had any chance to see if they can use ajax instead and if that works?
Other then that check if there are anything different to your document that are not used in other documents, such as section access,macros, file level security etc?