534 Local policy on server does not allow TLS secure connections

I am trying to configure a test FTP site via IIS 6.2 on a Windows Server 2012 R2

I created a site and configure the FTP SSL settings. I selected my certificate and choose custom.

If I don't have the settings I can connect properly but with this configured I am having an error stated below

Response:  220 Microsoft FTP Service
Command:   AUTH TLS
Response:  534 Local policy on server does not allow TLS secure connections.
Command:   AUTH SSL
Response:  534 Local policy on server does not allow TLS secure connections.

I am wondering if this is due to a server or in the configuration of my IIS.

Any help would be greatly appreciated.

Make sure SSL is enabled also in IIS root configuration, not just in site configuration.

See https://social.msdn.microsoft.com/Forums/en-US/6122b960-cbf8-4c8e-b432-e973dac6eb1a/expressions-web-design-software-and-ftp#74b31dfb-f44f-40c8-9c5c-905276232f96