The search engine results provider used in versions of CF Pro™ prior to 2.16 is now out of business. Most major search engines provide a RSS feed of their results which you can use instead of this module.
To use search engine RSS feeds, choose your ATOM/RSS Repost content source. Then go to your preferred search engine which provides RSS results.
When you're at your favorite search engine, perform a search. On the search results page, look for an RSS icon or click the orange box at the far right of your browser address bar. This URL is the URL you'll need to use for your chosen content source, replacing the word you searched on with #KEYWORD#O#F#+#. For example, http://www.a-search-engine.com/search.php?p=#KEYWORD#O#F#+#&lang=en&ei=UTF-8.
Now, we realize that this requires a bit more work than the SE module did, so if you get stuck, please contact support for specific help with the search engine you're planning to use.