Can't login to admin - No input file specified

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Hello all,

I just moved a site from test.cagsun.com to it's live location, mitracoaching.com and although the front end works, I can't ever login to the dashboard since I get a "No input file specified" error after entering username & password.

I tried everything with the htaccess and php.ini files, and the issue is not related to pretty url's either, as links like "http://mitracoaching.com/kocluk/... " work.

The url's that do not work are those appended to index.php like :http://mitracoaching.com/index.php/dashboard/...

I can access the logon screen from URL:http://mitracoaching.com/index.php?cID=2...
but can't get through it, because I can never reach:http://mitracoaching.com/index.php/login/do_login/...

Any ideas will be much appreciated, my current htaccess. is as follows:
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?pathinfo=$1 [L]
</IfModule>


And my php.ini:
cgi.fix_pathinfo = 0

Thank you

cagsun