Overwriting inherited method of a class

Hi all,

http://help.sap.com/saphelp_erp2004/helpdata/en/65/d4463c9c9ffc3ae10000000a114084/frameset.htm

As given in the above link I inherited the class CL_BSP_CONTROLLER2. When I try to overwrite a method called DO_REQUEST I'm prompted for an access key.

Did I miss something?

Regards

Noufal