BuddyPress.org

Hi. Basics: What version of WPMU and BuddyPress are you using?

Also: What version of MySQL is your server running please? Also, I have heard BlueHost supports only subdirectory installs as it doesn’t support wildcard subdomains, so can you confirm you’re trying the subdirectory install?

If that last question makes no sense, try removing your WPMU / BP install and databases and try reuploading/reinstalling manually, not using SimpleScripts. A search on this forum has revelead at least one person saying that their problems on BlueHost went away after they did a manual install.