CORBA::ORBit problems with fixed listening port

Hello all.

I'm running some tests with the ORBit perl binding and can't seem to be able
to specify the port the servant should bind to. This is my command line:

./UMARFServer.pl -ORBIIOPIPv4 1 -ORBIPv4Port 40112 -ORBIIOPUSock 0

But the port always varies:

UMARFServ 20592 acruz    4u  IPv4   11603612                 TCP *:36824
(LISTEN)

I've tried -ORBIPv4Port=40112 too but with no luck.
Is this supposed to work? The versions of the libs I use are:

ORBit: 0.5.17

CORBA::ORBit: 0.4.3

OS: Mandrake 10.1 Official

Thanks,
André