Modules & VBA :: Delete Records From A Table Using Controls On A Subform

I have a sub form that allows users to add staff to a project team, once added it populates a table which updates the subform showing the selected employee. I am trying to enable a delete function that allows users to remove an employee from the project team in the subform showing selected staff. Here is the code I have so far, but it doesn't work;

Code:
Private Sub Command4_Click()
Dim dbs As Database
Dim rs As Recordset
Dim sqlstr As String
Set dbs = CurrentDb
sqlstr = "DELETE tbl_CapexStaff.* FROM tbl_CapexStaff WHERE CAP_ID = Forms!frm_Switchboard.CAP_Live"
dbs.Execute (sqlstr)
End Sub