Connect failed.

Below is my session log. This is happening over and over again. What's going wrong?

SmartFTP v3.0.1018.1
[19:48:39] Resolving host name "ftp.solarplexusprods"
[19:48:39] Unable to resolve host name.
[19:48:39] Active Help: https://www.smartftp.com/support/kb/81
[19:48:39] Connect failed. Waiting to retry (30s)...
[19:49:10] Connection attempt 2...
[19:49:10] Resolving host name "ftp.solarplexusprods"
[19:49:10] Unable to resolve host name.
[19:49:10] Active Help: https://www.smartftp.com/support/kb/81
[19:49:10] Connect failed. Waiting to retry (30s)...
[19:49:40] Connection attempt 3...
[19:49:40] Resolving host name "ftp.solarplexusprods"
[19:49:40] Unable to resolve host name.
[19:49:40] Active Help: https://www.smartftp.com/support/kb/81
[19:49:40] Connect failed. Waiting to retry (30s)...
[19:50:11] Connection attempt 4...
[19:50:11] Resolving host name "ftp.solarplexusprods"
[19:50:11] Unable to resolve host name.
[19:50:11] Active Help: https://www.smartftp.com/support/kb/81
[19:50:11] Connect failed. Waiting to retry (30s)...
[19:50:41] Connection attempt 5..

you forgot the the .com or something at the end of your domain:
Wrong: ftp.solarplexusprods
Correct: ftp.solarplexusprods.com or similar