MyBB Community Forums

The full message is:
The server encountered an unexpected condition which prevented it from fulfilling the request.
The script had an error or it did not produce any output. If there was an error, you should be able to see it in the error log.

I can log in as administrator but have not been able to enter the forum, even from the admin console.

I could not find the error log and I don't know which file to edit. (if I can with my limited ability)

Ask your host if you're unsure on where the error log is, it might help see what's actually caused it. Do you have a .htaccess file?? If so, try renaming it to htaccess.txt

htaccess is already named htaccess.txt
I found the error log on my web site but no errors occur relating to mybb. I purposely tried both Firefox and IE to generate an error with both browsers. Still no errors in the log.
I opened the file index.php and did not see any obvious problems in the code.

Any suggestions?

I haven't seen this before but I would firstly try contacting your host, then also check if PHP is working properly by putting this code in a file called test.php, uploading it and going to it in your browser:

<?php
echo 'Hello World';
?>

It should say Hello World if it worked.

We got it working, Yahoo!!