Migratting Web Application using CI from WinXP to RedHat 9

[eluser]papanyaraka[/eluser]
Hello All... Need your Help.
I am developing web application using CI on WinXP. For more knowledge and experience, i try to using diffrent flatform, RedHat 9.0. Apache, PHP and MySql version I used are same one. But, the result is no display at all. No error message. Just Blank.
Can Anybody help me...