Mac Manager interrupting network performance


I do not know if others experienced the same problem, but when I run Mac Manager (for authentication), my ping time goes down from avg. 2ms to 1000ms. Also I cannot run tracert, because it always times out.

I also took it off the network with only a hub and one other computer and still the same problems.

Is there any way to configure the server correctly?

I really need some help on this issue