Unable to upload files to website

I can access the site from the Web but cannot upload files.

I haven’t used the site for awhile, so am assuming this relates to the IP address change near the end of last year. But GoDaddy's hosting site details shows the IP address was correctly changed. So shouldn’t a site I’ve had set up for 10 years (and have made no changes) continue to function without any other changes?

My FTP site setup is thru Dreamweaver. The first error notice says Dreamweaver cannot determine the remote server time. After hitting OK, the next message then says: An FTP error occurred – cannot get remote folder information. Dreamweaver could not connect to the server. Please check your network connection and try again.