Returning structures to Prolog from C code

[FORT David]

I see strange things when i try to return structures to prolog from C code,
here's some the samples:

implementation in C:
Bool test_list( PlTerm *list)
{
 int ip_atom;
 int new_atom;
 int functor_atom;

 PlTerm args[4];
 PlTerm tmp;
 ip_atom = Create_Atom( "ip" );
 new_atom = Create_Atom( "new" );
 functor_atom = ATOM_CHAR(',');
 args[0] = Mk_Atom( ip_atom );
 args[1] = Mk_String( "192.168.4.134" );
 args[2] = Mk_Atom( new_atom );
 tmp = Mk_Compound( functor_atom, 3, (PlTerm *)&args );
 *list = tmp;
 return TRUE;
}

prolog declaration
:- foreign(test_list(-term)).

And the faulty example:
| ?-  test_list( X ).    
X = ','(ip,'192.168.4.134',new)
yes
| ?-

Here i'd except (ip,'192.168.4.134',new) instead of 
','(ip,'192.168.4.134',new)
Am i missing something ?

PS: please CC 'cause i'm not subscribed to the list

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