117235 PHP Error on PHP system

Avg Bid (USD)
Project Budget (USD)

Project Description:
I have a project manager system, php Mysql, I had built 2-3 years back I installed it recently and it throws an error when trying to log in the error is as follows.

Fatal error: Class cusermanager: Cannot inherit from undefined class cmanager in /home/global/public_html/projects/lib/classes/CUserManager.class.php on line 11

There are plenty of references on the web about this error but my php skills dont go that deep, I think its a version compatibility issue or some thing along those lines.

Should be a quick fix for a PHP professional

Payment through paypal

Skills required:
Anything Goes, PHP, SQL
About the employer:
Public Clarification Board
Bids are hidden by the project creator. Log in as the employer to view bids or to bid on this project.
You will not be able to bid on this project if you are not qualified in one of the job categories. To see your qualifications click here.