2x RFC server on the same destination computer?

HI,
I'm new to sap and i don't know much about the way a rfc server connects to a sap gateway.
We are trying to run 2 rfc servers on the same computer. Both of them register at the same sap gateway, under diferent programID , but with the same destination.
the programID were registered with SM59.
One server registers himself, and the other no.
Any ideas?

ok, so that's what i'm doing, and it doesn't work for me: as i said, it doesn't throw any kind of Exception or anything, it's just running as if the code of the remote method do nothing.
i have a different name for each of the servers,
each server extends UnicastRemoteObject and implements a R.I/F, and when i do "super(port_num)" for each one of them- i give them different port numbers.
the clients are calling the right names in the lookup
but yet, nothig works.
maybe it's a codebase problem?
where should i define the codebase in such case?
can they have each one it's own codebase?
one (of the) thing(s) i don't fully understand about rmi, is the client port: if i have a simple client-server system on different computers, the client is "connecting out-wards" through the rmiregistry port (1099) ??
if so, when i have 2 clients on the same computer- they'll both try to
connect through the same port (1099) wouldn't that create a collision??

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