Trouble Connecting

I tried connecting to two different servers and they both give the same "Resolving hostname ".."" error.

[02:58:40] SmartFTP v3.0.1021.8

[02:58:43] Resolving host name "whocares357.zxq.net"

[02:58:49] Unable to resolve host name.

[02:58:49] Active Help: https://www.smartftp.com/support/kb/81

[02:58:49] Connect failed. Waiting to retry (30s)...

And

[03:01:09] SmartFTP v3.0.1021.8

[03:01:09] Resolving host name "ftp.royphay.com"

[03:01:17] Unable to resolve host name.

[03:01:17] Active Help: https://www.smartftp.com/support/kb/81

[03:01:17] Connect failed. Waiting to retry (30s)...

I know that both addresses are correct because I have used them (with smartFTP) yesterday. I can also log into the first one manually (the second one is one given to me by an employer).

I tried forwarding port 21 but to no avail. Does anyone have any ideas?

Hello ..

Please add SmartFTP to the exceptions in your software firewall and antivirus product. You may need to temporary uninstall/disable your software firewall or antivirus product.

Regards,
Mat