PHP/MySQL error

[Chris Truty]

For three weeks, I've been trying to resolve a problem between PHP and MySQL.  I have a
simple page that correctly displays phpinfo() with the MySQL section correctly being
displayed.  However, as soon as I establish a connnection and recordset within the page
(PHP), the generated code causes an Error 500 from the ISAPI module.   After the
recordset is established, all php lines generate the error and it happens regardless of
the database I'm connected to.  

I'm using IIS7 under Vista and have installed the latest versions of MySQL and PHP
according to online docs.   I don't know where to turn to find out what the server
doesn't like...

Any help would be GRATEFULLY appreciated,

Thanks,
Chris