SSL/TLS client handshake failed

I am experiencing this problem as well. The log is attached:

[16:58:11] SmartFTP v3.0.1021.6
[16:58:15] Resolving host name "XXX.XXX.XXX.XXX"
[16:58:19] Connecting to XXX.XXX.XXX.XXX Port: 21
[16:58:19] Connected to XXX.XXX.XXX.XXX.
[16:58:19] 220 Welcome to Optimal's Secure FTP
[16:58:19] AUTH TLS
[16:58:19] 234 AUTH Command OK. Initializing SSL connection.
[16:58:19] Connected. Exchanging encryption keys...
[16:58:19] SSL/TLS client handshake failed (Error = 0x2746).
[16:58:20] An established connection was aborted by the software in your host machine.
[16:58:20] Server closed connection

My system is running Norton 360. I have added a firewall rule that allows all connections to Smart FTP.
I'd appreciate any suggestions you have.