Thread:Project:Support desk/404 Not Found... Please Help/reply

Note, you seem to be getting 500 errors (not 404), which would be indicative of errors in your .htaccess. To be honest the -FrontPage- part looks kind of suspicious, but that could be me just not being familiar with frontpage.

You should perhaps try deleting the entire file, and just re-add the stuff you need line by line, until you figure out at what point the error turns into a 500 internal server error, to try and isolate which line is causing it.