IIS is misbehaving

My FTP site is not allowing anonymous logins anymore. I’m not sure when that happened but it used to allow them. I assume there is a solution to this within IIS adminstration but I don’t have Help installed to browse through it. Also just recently it has not been recognizing users attempting to login through IE and therefore not allowing them access and I’m sure the usernames and passwords are correct.

In addition to all that the FTP server is constantly being bombarded by requests to login to the home directory. These are showing up in Event Viewer. What’s going on with that? The latest Norton showed no viruses on the hard drive and it’s clean for Code Red.

Suggestions anyone?