Server 500 error on move of IPS install from domains

[perlgurl]

Hello, 

 

I'm doing something along these lines of the poster below, but I own and host both domains and have access to both the php install and the database.  I would like to use the database we have going on one site and thought I had done the transfer rather effortlessly, but then I moved the API key from one site to another (it was transferred with IPS) and though my adminCP comes up on the new site I'm getting a server 500 error for the public-facing forum.  I've checked my conf_global.php to ensure the values are correct there.  

 

What else might I be missing? 

 

[TheSonic]

You really have to check the errorlogs of PHP and your webserver - Error 500 can be caused by a wide range of Problems.