ASP is Windows. Windows does not support .htaccess, as this is a Linux (Apache) thing. You will need to use IIS's control panel to manage redirection of folders; this is accessible on the server itself.
I personally am not a fan of Windows hosting (Linux, in my opinion, is much better at that, as it's much more light weight and flexible, and can sustain higher workloads than equivalent Windows servers simply because there's less bloat--this is also why Windows shared hosting is more expensive (and the OS isn't free either)).
