well, if you have opened/edited any of the files or uploaded any of the files with dreamweaver, then this could be your problem.
the only way to know for sure is to stop using DW for phpbb at all.
start over with clean files from the zip file you download from here.
then, get and use a real ftp program to upload the files.
upload all new files to overwrite the ones on the server,
edit your config.php file accordingly
tell us what errors you get if any.
I'm baaaaaccckkkk. still doing work on donation basis. PM your needs.
Premium phpBB 3.3 Styles
If nobody is in the forest, does a tree really fall?