[Serusers] Call between two domains on this same machine

[radan]

Hello all !
I use ser 0.8.11 with support for i.e abc.net and def.net 
two different domains.
I can call from each domain to everywhere
but I'cant call between this domains where
ser is responsible for
call between users registerd in abc.net and def.net
is impossible. Too many hops.
Where and what do I have to put to config to fix it ?

Thanks
Andrzej