Apache problem

[proskater123]

Can i changed webservers from abyss to apache. I installed it through phptriad. I'm trying to run e107 on it and im grtting this error when i try installing e107.

Fatal error: Call to undefined function: ob_get_level() in c:apachehtdocsclass2.php on line 53

AND WHEN I RUN THE INSTALL.PHP FROM LOCALHOST/INSTAL.PHP

I GET THIS ERROR

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, admin@localhost and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Apache/1.3.23 Server at localhost Port ****

[Sparda]

What dose the server log say?