I am not able to send invitation mail. How to configure that.

First, make a test of the function "mail()" on your server, to make sure that your server has the ability of sending out emails.

yes i am able to send mail from server.

If so, the invitation should be working, no extra configration needed.
what's your site URL? Can I make a test on it?

The same seems to be happening to me aswell.

URL: http://www.kentcomp.co.uk/

Regards,
Michael Swan

Hello friends,I've the same problem like her.I've tested in "Byethost" and itsn't work.
I've tested in other server too,but I've the same problem.

Ah! My "phpmail" is enable,so I don't know what is happening.

Cheers!