Merge Replication And Foreign Keys

i'm struggling with merge replication and foreign key constraints.

i have four tables:

- owners(id, name, firstname, address, phone)
- cars(id, licenceplate, ownerid) (thus with ownerid FK to the owners table)
- busses(id, licenceplate, ownerid) (thus with ownerid FK to the owners table)
- ships(id, licenceplate, ownerid) (thus with ownerid FK to the owners table)

now, i want to merge only the OWNERS table (article) between my 5 client pc's and 1 server.

I don't manage to reach this.
Using the merge replication upon all 4 tables works, but replicating only the owners table seems to be impossible.

Is it really impossible to replicate only the owners table, or do I forget something?

these are my create table scrips:
create table Owners (
id int identity,
name varchar(20),
firstname varchar(20),
address varchar(20),
phone varchar(20),
CONSTRAINT PK_owners
PRIMARY KEY(id)
);

create table cars (
id int identity,
licenceplate varchar(20),
ownerid int,
CONSTRAINT PK_cars
PRIMARY KEY(id),
CONSTRAINT FK_cars_ownerid
FOREIGN KEY(ownerid) REFERENCES owners(id) ON DELETE CASCADE
);

create table busses (
id int identity,
licenceplate varchar(20),
ownerid int,
CONSTRAINT PK_busses
PRIMARY KEY(id),
CONSTRAINT FK_busses_ownerid
FOREIGN KEY(ownerid) REFERENCES owners(id) ON DELETE CASCADE
);

create table ships (
id int identity,
licenceplate varchar(20),
ownerid int,
CONSTRAINT PK_ships
PRIMARY KEY(id),
CONSTRAINT FK_ships_ownerid
FOREIGN KEY(ownerid) REFERENCES owners(id) ON DELETE CASCADE
);