Would  you please more details

which handler? Where to check? What should it be?

You should check if "*.sauth" extension for this handler is processed by the IIS 6 in order to be routed to MonoX app.

Regards

I appreciate if someone helps me.
Login using Facebook account is very nice feature but I can't make working on IIS 6.0 platform. The same settings worked in IIS 7 with no problem.
Yesterday, I tried to the latest build (4506) and edited FacebookWrapper in web.config (the only thing I changed)
BUT, still getting the same error.

Have you tested this functionality in IIS 6.0? Do I need to do additional changes?

Please help

Hello,

MonoX uses SocialAuth-net library and they don't officially support IIS6. Please see:
http://code.google.com/p/socialauth-net/issues/detail?id=69
http://code.google.com/p/socialauth-net/issues/detail?id=131

Regards,
Mario

Thanks a lot

Is there anyway to achieve the same functionality and supported by iis6.0?

Hello,

One of our coworkers wrote a blog about using Facebook C# SDK to develop custom login functionality. Here is the link in case you are interested: http://www.mono-software.com/Blog/post/Mono/179/Using-Facebook-API-in-ASP-NET/

Regards,
Mario