Please don't post general correspondence in the secure tab otherwise other members cannot see what you wrote. Only use the secure tab for confidential information such as passwords and logins - describe your issue in the public tab.
I can't do much with that - look in the apache error log, enable WP_DEBUG mode. Without some sort of error message I'm flying blind. Check your PHP version, check your PHP memory_limit.
Regards, Mark.
Please search forums before posting. Please make sure your post includes the version of the CMS you are using and a link to the problem. Annotations on screenshots can also be helpful to explain problems/goals. Please use the "secure" tab for confidential information.