Later on when I deactivated other WordPress plugin Theme My Login, then it worked fine.
So Problem is with Themme My Login plugin
Dear mightymouse1
This is really a superb plugin.
If you don’t like frequent updates of this plugin, why don’t you just uninstall it.
If you can’t show your gratitude for getting it free, at least be courteous.
me too got the fatal error
I have the same problem, I can’t get rid of index.php from permalinks
