Multiple Nics problem

I have several ethernet ports in my system, but it seems that only the
default port can be used.

If I disable the default one, the QNX 6.3 select another one as
default and active it.

I want to use all the ports simultaneously.
I think my network did not configure correctly. But I don’t know

I had tried to change the routing table, routing interface, but

Any suggestion? thanks