Update ACCESS 2010 table field based on value in another field with VBA

I have a table with a field DealDateContract.  There are two additional fields in the table that need to be updated with information based on the date in this field, but I can't get the below to work.  Am not sure if there is a QUATER function in ACCESS 2010.  

Public Sub YearQuarterSort()
'UPdates quarter and quarter sort columns in tblReportSource table
Dim rst As DAO.Recordset

Set rst = CurrentDb.OpenRecordset("tblReportSource")
With rst
rst.MoveFirst
Do While Not rst.EOF

        .Edit
            If IsDate(.DealDateContract) Then
        !YrQtr = Year(.DealDateContract) & "-Q" & Quarter(.DealDateContract)
        !YrQtrSort = Year(.DealDateContract) & "-Q" & Quarter(.DealDateContract) & .DealDateContract
        .Update

Loop
    rst.Close
    Set rst = Nothing
End With


End Sub