Windows 2008 R2. Zenworks 11.2.3a.

I am tasked with building a bundle that will wake up a group of 20 PCs. It worked on my testbench when did it one computer at a time. When I expanded my test to three PCs at a time it quit working.

Event viewer on the server shows multiples of the following event ID #4096;

Code:
ERROR: [8/2/13 6:17:19 AM] WakeOnLANHandler The device 'wxp-test-146+10.8.22.78' (d3adb28d691c1e5151820ffc12aa8eb9) has been signaled to wake up, but did not respond. The device 'wxp-test-146+10.8.22.78' (d3adb28d691c1e5151820ffc12aa8eb9) has been signaled to wake up, but did not respond.
Any idea how to fix the WoL functionality?