Using More than 4GB of RAM

Hello, I have upgraded my kernel to the latest 2.4.19 SMP kernel available form SuSE. I noted in one of the readme files that the 4GB memory problems had been corrected. I have a dual Processor MSI K8D Master System Board, which still does not operate when each of the 6 memory slots has a 1GB chip installed. This there a problem with my BIOS settings, or is there still a problem with the Kernel? Regards Louie