Two things.
1. Check the console as it says to. It took me a bit to figure out, but the console is the "other" window that blender opens up and runs in the background. All the text and stuff like a DOS window is the console. Try an export and if it fails, scroll up through the console to see if there are any error messages or what it tells you.
2. for some reason the version of the export script that I got had an invalid character in it. Since the line and character were commented out (I believe it was just credit to somebody else for developing some part of the script), I went ahead and deleted the offending character. It's worked fine since then (except when I make a mistake
) If it is this, the console will say something like "invalid character: line 160" or something. Find that line (or just try a search in notepad even) in the script file.