Warning: Call-time pass-by-reference has been deprecated;

After fresh installaltion on drupal 6rc1 on latest wamp build.

I got that warning after enabling the module...

Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in C:\wamp\www\public_html\cms\sites\all\modules\visualize_backtrace\visualize_backtrace.module on line 459