RC6 FileManager not working!

[mikehost]

im running rc6 on fresh ubuntu 8.04 server everything seems to be working except for the filemanager, doesnt matter what info is put in at the filemanager login does nothing but load a blank screen. second when adding an ftp user when choose dir panel pops up it just says "Can not open directory!"

im running php 5

system is updated and installed following the instructions provided for it by ispcp

thanks in advance for any in site on fixing this issue.