Message Queues - problem

[gnacz]

I have problem with method: GetPrivateQueuesByMachine.
I call:

MessageQueue[] m = GetPrivateQueuesByMachine("COMPUTER");

where COMPUTER is a local network machine.
After calling this method I can see in DebugWatch that values of some properties of m[i] are set to:
<error: an exception of type: {System.Messaging.MessageQueueException} occurred>
For example: m[0].Transactional <error: ...
MyComputer = W2K, COMPUTER = WinXP.

Please, help me.