scanning in top downloads???

Im on a windows box using iis. i have tried every conceivable configuration to get my scan button to work in the admin panel. The relative path:

# base url to the downloads without trailing "/" (use for scanning)
$base_url = "http://www.agesupply.com/products/manuals/aas";

# path to the downloads from the server root! (use for scanning)
$base_dir = "e:/ages/products/manuals/aas";

is not working, i hit the scan button and the page just refreshes. I noticed before i set the base_dir it was formatted for a unix box, /home/blah/blah/htmldocs/, is my relative path to the server formatted correctly?