Warning: Parameter 1

[fivepix]

I'm getting the following error:

Warning: Parameter 1 to cms_module_Lang() expected to be a reference, value given in /home/bjhardic/public_html/seminars/lib/classes/class.module.inc.php on line 2003

Currently running:
1.6.7 "Teremba Bay"

System - UNIX
Server - Apache 1.3.x
PHP - 4.4.x
MySQL - 4.1.x

I'm not very technical, how can i solve the issue with out upgrading?

If I have to upgrade could I simply upgrade to the latest version?

[fivepix]

Upgraded. Issue fixed.

Thanks.