Login issue

After successful login into admin panel blank page is displaying.
Please suggest what may the reason and how to resolve it


check your webserver error log, there might be some hints

I didnt get much info from log files but in browser firebug it displays

Refused to display ‘http://www.fire-safety-products.com/admin/index.php?editlanguage=0&force_ad…id=eo522i1haukmlbv40vkt9l6tq1&stoken=FA9B576A&&cl=navigation&item=home.tpl’ in a frame because it set ‘X-Frame-Options’ to ‘SAMEORIGIN’.

did you or your provider / system administrator change webserver configuration shortly? maybe updates?
X-Frame-Options header should not appear in admin frameset by default,