It seems that QVS 9 does not have plugin_functions.asp and install.inc files inside QlikView\Server\QvClients\QvPlugin directory. I had to manually copy these 2 files from older QlikView installation. And then was able to access QV document via ASP.
Unless IIS is absolutely mandatory at your site then I would recommend that you do not use it.
You need to have the QlikView web server service running anyway (because it takes care of AccessPoint) so why not use it as your web service. Just stop IIS and you should find that QlikView will be working.