I have taken over someone else's code. It's an ASP.NET application using U-Upload Pro v1.6.4, with FTP sites set up in IIS 6.

FTP uploads were going to the wrong FTP site address (IP Address *.*.*.2), though. I changed the FTP site IP address to *.*.*.8, and now I'm getting the following error message: "username or password incorrect."

The system administrator added a new account to the directory where the files should be going, and I changed the application to use that account by setting the user and pass variables in the uuploadpro.js file, but I'm still getting the error.

Where does authentication occur when using uuploadpro in an ASP.NET and IIS environment?