I assume its the way you have the default one set up.
You'll find that the default one is what boots if you don't press anything in 30 seconds if you have more than one operating system. Since you don't have more than one, theres no point this coming up.
rdisc on the operating systems one is set to 0 yet on the default its set to 1. Switch the Default one to 0 on rdisc and it'll work
multi(0)disk(0)rdisk(0)partition(1)\WINNT="Microso ft Windows 2000 Professional" /fastdetect
Hope this helps