I suspect that it will work if you do this
& "&_fid_279=" & URLEncode("PLS Review Complete");
The issue is that you are building a URL string. Whenever you include in a URL any characters, including spaces, which are not one of the A-Z or 0-9, then you must URLEncode.
Think of it this way.
You have never seen a URL in your life which has spaces in it. They do not exists, at least ones that work properly. So when you have any special characters including spaces as a possibility in your data, then you must URLEncode.
