Remoting disconnected problem

[Maurice]

Our product is build using the .NET framework 1.1.

We have WinForm application that communicates a server via Remoting (tcp
channel).

We have two ways communication:

From application to server using a singleton remoting connection (using
Activator)
From server to application using delegate (using delegate wrapper – a simple
marshal by ref object).
THE PROBLEM: The connection from server to application (marshal by ref
object delegate) is disconnected from time to time. The server tries invoking
events and receives the following exception "No connection could be made
because the target machine actively refused it". This problem happens
randomly. We check the "Life Time" of the object and it turned out to be ok
(We override the required method in the MarshalByRef interface).

Note: We have several applications on the same machine that concurrently
communicate with the same server in the manner I have mentioned earlier.

Can you suggest how to solving this problem? Is that a known problem?

I'll be happy to provide more information if needed.

Regards,
Maurice