how to update a datatable to access

[odelya]

hi!
i have this datatable:

adpt = New OleDbDataAdapter("select * from design where id=2", cnn)
 
adpt.fill(header)
header.Rows(0).Item("font") = lbl.Font
 
header.Rows(0).Item("fore_color") = lbl.ForeColor
 
header.Rows(0).Item("font_size") = lbl.Font.Size
 
header.Rows(0).Item("italic") = lbl.Font.Italic
 
header.Rows(0).Item("bold") = lbl.Font.Bold
 
when i want to update the datatable to access, i write:
adpt.Update(dt)

all the lines are running, except for the last one which says:

Update requires a valid UpdateCommand when passed DataRow collection with modified rows.

what can i do?