First i would like to thank you for your help.
i did asked for the error logs and i get the following:
[Mon Jan 13 11:34:40 2014] [10701987] [fcgid:warn] (104)Connection reset by peer: [client 213.175.171.117:52428] mod_fcgid: error reading data from FastCGI server, referer http://cficonsult.com/wp-login.php
[Mon Jan 13 11:34:40 2014] [10701987] [fcgid:warn] (104)Connection reset by peer: [client 213.175.171.117:52428] mod_fcgid: ap_pass_brigade failed in handle_request_ipc function, referer http://cficonsult.com/wp-login.php
[Mon Jan 13 11:53:32 2014] [10701987] [fcgid:warn] (104)Connection reset by peer: [client 213.175.171.117:56599] mod_fcgid: error reading data from FastCGI server, referer http://cficonsult.com/wp-admin/options-general.php?page=wpsupercache&tab=settings
[Mon Jan 13 11:53:32 2014] [10701987] [core:error] [client 213.175.171.117:56599] End of script output before headers: admin-ajax.php, referer http://cficonsult.com/wp-admin/options-general.php?page=wpsupercache&tab=settings
