Ftp – Unable to setup FTP access to Amazon EC2 Windows Server 2008 R2 instance

I'm trying to set up FTP access to my Windows 2008 R2 instance. I have followed the guide here:

http://handziuk.com/blog/post/2014/10/01/setting-up-ftp-access-to-windows-2008-r2-through-amazon-ec2

and here:

https://stackoverflow.com/questions/26470039/how-to-enable-ftp-passive-mode-for-amazon-ec2-server-with-iis

I have done the following:

1. Installed FTP services in IIS
2. Set up an FTP site in IIS pointing to the directory where I want the files to be accessed.
3. Configured FTP firewall support at the server level using ports 41000-41099 and external IP address of my elastic IP

4. Run the following:

   netsh advfirewall firewall add rule name=FTP_Service action=allow service=ftpsvc protocol=TCP dir=in
   
   netsh advfirewall set global StatefulFTP disable
   

5. Added the necessary inbound rules in the instances security group for ports 41000-41099 and 21

6. Restarted the FTP service.

However In FileZilla I am still unable to connect using the elastic IP and my Administrator login credentials. I get this error:

Status: Connecting to Elastic IP...
Status: Connection established, waiting for welcome message...
Error:  Connection closed by server
Error:  Could not connect to server
Status: Waiting to retry...
Status: Connecting to Elastic IP...
Status: Connection established, waiting for welcome message...
Error:  Connection closed by server
Error:  Could not connect to server