I am trying to set up the SSL FTP to work on windows server 2008 r2 in the Cisco ASA 5510 dmz.  Running FTP without SSL is successful, but when applying the SSL in FTP, I get the following error message: 

550 The network connection was aborted by the local system.

Error: Failed to retrieve directory listing

I've checked Cisco document and it said "FTP with TLS/SSL (SFTP/FTPS) is not supported through the Security Appliance.  FTP connection is encrypted, so there is no way that the firewall is able to decrypt the package."  Do you know any other way to get around it?

Regards,

Nelson