Creating cluster over subnet, controller cant find cluster!

Hi,

Running a macbook pro running 10.6.5 with a subnet of mac mini's (all ppc) via a netgear gigabit switch.

Have set up the three minis to service only and in QAdministrator I can see them all together in the service browser.

However, with my mac book pro set to controller i cant see anything but my mac books cores in the service browser. Am I doing something wrong? Is this a fools errand? Any help greatly appreciated.