Hi kh99
I asked my host to check the above and they replied me that during the testing they found these errors.
[Sat Jan 05+14:55:00+2013] [error] [client69.xxx..xxx.xxx] Premature end of script headers: options.php, referer:+
http://www.mysite.com/admincp/option...roup=%5Ball%5D
[Sat Jan 05+14:55:00+2013] [error] [client69.xxx.xx.xxx] invalid CGI ref "/500.php" in /home2/xxxx/public_html/mysite.com/500.shtml, referer:+
http://www.mysite.com/admincp/option...roup=%5Ball%5D
Any help on this??
Thanks in advance