multiple relationship tables on Datagrid

Problem: The below will display: home_name, person_id, person_name, person_age, person_job
field records with no problem. However when i re-create da1 to input tb3 & tb4 and select
the company_name field to show on the datagrid as well, it doesnt display any records. The
relationships are created in the MS access already and when i used data adapter query builder,
the relationships are there as well, am i missing any steps?

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Private Sub frmResults_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

'da1 is a data adapter that has 2 tables: tb1 & tb2
'i used vs.net to drag the oledbdataadapter to select fields using sql query builder
'the datagrid will show eg: home_name, person_id, person_name, person_age, person_job
da1.Fill(ds)

dataview = ds.Tables("tb1").DefaultView

'dg is datagrid with dataview as DataSource
dg.Datasource = dataview

Table: Fields
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tb1: home_id, home_name, home_type
tb2: person_id, person_name, person_age, person_job
tb3: company_id, person_id
tb4: company_id, company name

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any advise will be appreciated!