That message is likely not an error, but that you're using a language that we don't support out of the box. If you're not using the English, German, Hebrew, Italian (or one of a few other) languages, please go to your /languages folder and copy the /en_GB/en_gb.com_jfbconnect.ini file to your langauges folder and change the prefix of the file appropriately. Then, in there, you can set whatever custom message you want (or leave it blank for no message).
If that's not the issue, let us know, and we can look into it further. Also, you may want to send a link to your site (either post here or Private Message it if you don't want it public).
Hope that helps,
Alex