Stagewebview Get parameters local files?

I am using stagewebview to load local html files in my air applications. When I add and GET parameters to a local files url (ie ?test=test) I get an error stating that the files location does not exist. Loading the same file without the parameters works great. Also loading a external html page with parameters works perfectly.

My question: How can I add GET parameters to a url when loading a locally stored HTML file?