I C&P'd your code to a page on my local webserver and it ran fine, so the problem remains with your authorisation.

I don't understand your description of how you have tried to authorise your webserver account. I haven't seen or used IIS for 7 or 8 years, circa. v2 or 3?, but unless things have changed beyond recognition, what you describe doesn't look even vaguely correct.

At this point your problem is not a perl problem at all, and I don't have the knowledge to help you with it. You either need to read the documentation, search the web, or ask your question somewhere there will be poeple who will know the answer.