'Unable to resolve host name'.

I'm unable to connect to remote server???

The prompt says;
[21:05:04] SmartFTP v3.0.1023.4
[21:05:04] Resolving host name "lh.28.dnsireland.com"
[21:05:04] Unable to resolve host name.
[21:05:04] Active Help: https://www.smartftp.com/support/kb/81
[21:05:04] Connect failed. Waiting to retry (30s)...

+353 87-2399939

The host you are using does not exist. Please contact your web hosting provider for assistance. For further details please take a look at this article: