I just notice this message. -->

This should be the base URL of the secure / HTTPS part of your site. Many payment processors do not require your checkout to be on HTTPS, but it is becoming increasingly recommended. For example:
https://www.myurl.com/mystore/
You have the parameter "$pathtossl" set in your includes.php file. This parameter is no longer used as the parameter is set here in admin. If you wish to override the parameter, use "$orstoreurlssl".


I see this on my includes.php page.

$pathtossl = "http://www.acadianhouse.com";
$pathtossl = "https://www.acadianhouse.com";

What should chanage?

Remove those two lines. They don't do anything anymore.
If you are using an SSL on your site, you should have it set in the admin main settings there.