Re: HELP!!!
To quote myself from 5 months ago about bluehost problems:
...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?
And
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.