Forms :: Update A Table Using A Form

I'm a relative beginner at VBA and I'm trying to use a form to update a table. The form is used to get an agent name, start and end date. When they hit the "update" button, I want to go to the table, select all records where the agent name (called Fullname in the table) matches and the field called "event_date" is between the start and end dates. I have the below code, which isn't working.

Set rst = CurrentDb.OpenRecordset(Table)
rst.MoveFirst
Do While rst.EOF = False
If rst.Fields("Fullname").Value = Me.Agent And Me.StartDate <= rst.Fields("event_date") And rst.Fields("event_date") <= Me.EndDate Then
rst.Edit
rst.Fields("CompleteDate").Value = DATE
rst.Fields("Comments").Value = "Autofilled"
rst.Update
End If
rst.MoveNext
Loop
rst.Close