[eluser]CroNiX[/eluser]
I had this problem as well. I found the problem was in the htaccess and using your line:
RewriteRule ^(.*)$ /index.php/$1 [QSA,NC,L]
I had to change mine to:
RewriteRule ^(.*)$ /index.php?/$1 [QSA,NC,L]
Adding the (?) after index.php
Not sure why....but it fixed it and maybe it will work for you too.