Inner Join Delete in SQL Server 2008?

I am trying to join 2 tables together and do a delete on it.

DELETE TableA 
FROM TableA a
INNER JOIN
TableB b on b.Id = a.Id
where title like 'test' 

The above is what I come up with however I keep getting

The DELETE statement conflicted with the REFERENCE constraint

I thought if I merge the 2 tables together then I will delete both at the same time and no constraints would be conflicted.

Am I missing something in my query?