Refreshing subform based on selection from another subform

My form contains Mainform, Sub1, Sub2.  On load of the Main form both subforms are hidden.  On click from Listbox, Sub1 becomes visible and list the appropriate data based on selection.

Step 2.  On Click of the Managers' name then Sub 2 should become visible and the data should be all employees assigned to the selected Manager.

However, what is happening is the Sub2 is either blank or will not requery on change of Manager's names.  See my code and let me know what I am missing.

When I return to the form from Design view it seems to be working correctly - What is preventing it from opening the sub2 form correctly with the correct data on start of the form - I am getting the error until I change the view from live to design and back again.

Karen

'******** On Load of Main Form ************************
Private Sub Form_Load()
   On Error GoTo Form_Load_Error

    If Forms!Switchboard.Visible = True Then
        Forms!Switchboard.Visible = False
    End If
        Forms![frmTrainStatus].Section(0).Visible = False
        Me.sub1.Visible = False
        Me.sub2.Visible = False
        Me.lblSub2.Vertical = False
    If IsLoaded("frmTrainStatus_Sub") Then
        DoCmd.DoMenuItem acFormBar, 4, 0, , acMenuVer20
        Me.LblMgrHdr.Visible = True
    Else
        DoCmd.Restore
        Me.LblMgrHdr.Visible = False
    End If

   On Error GoTo 0
   Exit Sub

Form_Load_Error:

    MsgBox "Error " & Err.Number & " (" & Err.Description & ") in procedure Form_Load of VBA Document Form_frmTrainStatus"

End Sub
'**************** On Selection of Listbox*****************
Private Sub lstUnitChief_AfterUpdate()
Dim db As DAO.Database
Dim qdf As DAO.QueryDef
Dim rs As DAO.Recordset
Dim rs1 As DAO.Recordset
Dim rs2 As DAO.Recordset
Dim strSQL As String
Dim strSql1 As String
Dim strSQL2 As String
Dim MyString As String

Set db = CurrentDb()

    MyString = vbNullString
    With Me.lstUnitChief
        If .ItemsSelected.Count > 0 Then
            For Each i In .ItemsSelected
                MyString = .ItemData(i) & "," & MyString
            Next i
            MyString = Left(MyString, Len(MyString) - 1)
        End If
    End With
    Forms![frmTrainStatus].Section(0).Visible = True
    Me.sub1.Visible = True
    
    strSQL = "Select * from qryEmpTrain_byMGRSummary Where UCBEMS IN(" & MyString & ")" & _
                "Order by MgrName"
    Set qdf = db.QueryDefs("qrytemp")
    qdf.SQL = strSQL
    qdf.Close
    
    Forms![frmTrainStatus]![sub1].Form.RecordSource = "qryTemp"
    
    If Me.LblMgrHdr.Visible = False Then
        Me.LblMgrHdr.Visible = True
    End If
    
    Me.sub1.Requery
   On Error GoTo 0
   Exit Sub

cboUnitChief_AfterUpdate_Error:

    MsgBox "Error " & Err.Number & " (" & Err.Description & ") in procedure cboUnitChief_AfterUpdate of VBA Document Form_frmTrainStatus"
End Sub


'********************************************************
Private Sub Manager_Click()
   On Error GoTo Manager_Click_Error
Dim db As DAO.Database
Dim qdf As DAO.QueryDef
Dim rs As DAO.Recordset
Dim strSQL As String
Dim strSql1 As String

Set db = CurrentDb()

    gBEMS = Me.ManagerID
    gORG = Me.OrgCtr
    gMgrEmail = Nz(DLookup("StableEmail", "tblEmployee", "BEMS = " & gBEMS))
    strSQL = "Select * from qryMgrTrainTotals"
    Set rs = CurrentDb.OpenRecordset(strSQL)
    If rs.RecordCount > 0 Then
        Forms![frmTrainStatus].Section(2).Visible = True
        Forms![frmTrainStatus]![sub2].Visible = True
        Forms![frmTrainStatus]![lblSub2].Visible = True
        Forms![frmTrainStatus]![sub2].Requery
  
        Me.Refresh
        DoCmd.Maximize

        
    Else
        Call _
            MsgBox("Please make another selection, the manager you selected currently does not any employees assigned to them.  Please update the Employee Info database and return upon completion.", _
            vbCritical, "No Data Found")
    End If

   On Error GoTo 0
   Exit Sub

Manager_Click_Error:

    MsgBox "Error " & Err.Number & " (" & Err.Description & ") in procedure Manager_Click of VBA Document Form_frmMgrTrainStatus_sub"
End Sub

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