It worked! thanks again!

Thanks! I'll try that. I thought it might be that, but I wasn't seeing the file on my computer either and i've been able to see .htaccess files on it before. Will it be in the main directory (/serendipity/.htaccess) or in a sub directory? I guess i'll find out when i try another FTP.

Thanks again!

I need to delete my .htaccess file because of this:

If you instead see a "HTTP 500" error screen, this means that your Web Server did not allow Serendipity to create custom ".htaccess" directives. In this case, you can just delete the file ".htaccess".

But I can't seem to find the .htaccess file ...