There shouldn't be any more configuration within JFBConnect required other than adding the API/Secret keys.
That error means there's something wrong when communicating details between Twitter and your server. Can you double-check:
* That you followed every step of the
Twitter Application Setup Guide
.
* Check the time on your server. It needs to be accurate to within about 10 minutes. If the time and date are off by too much, Twitter will think the authentication request is a forgery and can fail
* Make sure that the API/Secret key were copied correctly. Sometimes dashes or other characters can get cutoff when copying/pasting.
Let us know how that goes.
If it doesn't help, please set the "Enable Debug Mode" option in JFBConnect to 'Yes' and try again. Then, let us know the exact error message that appears along with any numerical code, that is displayed when you try to authenticate.
Thanks,
Alex