Unable to stay connected

Hey everyone. First post because I need some help. I am trying to update my website but I cannot stay connected in SmartFTP. Below is what is says. The error in bold is probably my problem, but I don't know what it could be. My computer skills are VERY limited and I don't know what to do. Everything worked fine in October when I updated my site last. I haven't added any programs since then that I think would affect it.

Any help?

Thanks in advance...


19:50:24] Resolving host name "ftp.dakotahuntingdog.com"
[19:50:24] Connecting to Port: 21
[19:50:24] Connected to ftp.dakotahuntingdog.com.
[19:50:45] An established connection was aborted by the software in your host machine.