Installation 1.3.9a blocks after PhPBB-window?

HELP PLEASE! Installed the latest version of Zen Cart 1.3.9a yesterday and hostes it with a server using Linux. Also created MySQL. The uploading and CHMOD all went fine. NO errors. The PhPBB-window I leave as it is and continue. The screen turns blank and that is it. I return and try again, nothing. I have checked the log and it announces no error. I am stuck, what can I do? :cry:

Search the forums for 'installation phpbb blank' for a whole bunch of threads about possible causes. It looks like missing or corrupted files is the most common cause.
Re-upload the zc_install folder, and its subfolders, to your server.

Thank you much. I deleted all the files twice or three times, I changed to cable Internet, I created a new directory for the files, uploaded the whole lot again and .......... PERFECT. Thank you!