open_basedir = directive
What do you mean?? I dont have that code in my php files.Try removing thefor each of your custom PHP web site paths and it should work fine without the 500 Internal Server Error,PHP:open_basedir = directive
My next guess would have been giving more Memory than the 16 MB allotted via the "more secure" php settings.
Make sure you have made the necessary changes in the loaded php.ini file. if display errors is off you wont see an error youll see a iis error page.Here's more of the page btw.You must be registered for see links
Nad no, nohting to do with mysql.