SuSE 7.1 HELP

I've upgraded my desktop-machine from SuSE 6.4 (kernel 2.2.14) to SuSE 7.1, intending to use kernel 2.4. When I select the 2.4 kernel in yast, it seems to install it, reruns lilo... and I reboot, only to end up with the 2.2.18 again... I've tried this several times (even selecting 2.4 for i386 doesn't work). Help? Kind regards Guy