OK, I submitted a ticket to the Host's support. They are running PHP5+...
I found I can successfully execute the ubbaccel_test.php script from any other folder then where it needs to be! I even renamed the present folder and created a new sisubb, installed the ubbaccel_test.php file and it executes perfectly! So I moved all the files over into the new noncgi directory and the ubbaccel_test.php still works, but now I can't even get into control panel! Moved them back and everything is fine, I just can't use the accelerator!
This has to be a server path issue of some sort. Odd another directory of the same name keeps the forum from working...
