Please supply the info for your case, similar to what I provided in this post in this thread.

Just posting frustration without details makes it impossible to help you.

I found setting my N900 up was *much* easier than previous Symbian-based phones.

The error message you get I have seen when I didn't have the CA cert (that issued the RADIUS servers certificate) installed, but it didn't prevent authentication from working (iPhone doesn't give this error message, but rather a one-time certificate acceptance dialog, as it has some less-than-ideal security defaults).