Did you start with a new database each time or delete the tables before you reinstalled? Otherwise, you aren't reinstalling (in Useful Threads there is info about this).
If you are getting a blank page after a good install it could be a few things (because you can install even if some things are not correct)...
- there is some kind of strange permissions issue on a file or files
- there could be missing or damaged files (from FTP at uploading)
- the host is really weak (like free hosting)
I don't see the root 'index.php' file on your site which leads me to believe that not everything was uploaded.