Hello,
I think you need to be a little more specific on the subject. What kind of error messages, if any, are you getting, what is the symptom that made you think that it was not working, etc?
I am not very familiar with IIS, but given that you are using PHP 5 and having a problem with MySQL, you might want to check this out, especially if you are getting "function undefined" error:
http://jp2.php.net/manual/en/faq.dat...ses.mysql.php5
HTH.