Having trouble with a DateTime in my query

I am trying to grab the purchase orders from my database that took place on todays date.

My query looks like this:

VB Code:

Dim cnn As New SqlConnection(strCon)
        Dim cmd As New SqlCommand
        Dim da As New SqlDataAdapter
        Dim ds As New DataSet
        'Try
        cmd = cnn.CreateCommand
        cmd.CommandText = "SELECT " & _
            "PurchaseOrders.CreationDateTime," & _
            "PurchaseOrders.StoreID," & _
            "PurchaseOrders.PurchaseOrderNumber," & _
            "PurchaseOrders.VendorCode," & _
            "PurchaseOrderItems.ItemCode," & _
            "PurchaseOrderItems.Description," & _
            "PurchaseOrderItems.VendorItemCode," & _
            "PurchaseOrderItems.VendorUnitCode," & _
            "PurchaseOrderItems.VendorOrderQuantity," & _
            "Stores.AddressLine1, Stores.City," & _
            "Stores.State, Stores.ZipCode " & _
            "FROM PurchaseOrderItems INNER JOIN " & _
            "PurchaseOrders ON PurchaseOrderItems.PurchaseOrderID = " & _
            "PurchaseOrders.PurchaseOrderID INNER JOIN " & _
            "Stores ON PurchaseOrders.StoreID = Stores.StoreID " & _
            "WHERE PurchaseOrders.PurchaseOrderStatusCode = 'Ordered' AND (" & _
            "PurchaseOrders.VendorCode = 'Spartan Oil Corporation' OR " & _
            "PurchaseOrders.VendorCode = 'Vesco Oil Corporation' OR " & _
            "PurchaseOrders.VendorCode = 'Polymer Dynamics' OR " & _
            "PurchaseOrders.VendorCode = 'Mighty Auto Parts East') AND " & _
            "PurchaseOrders.CreationDateTime >= " & "2/19/2007 10:21:00 AM"
        da.SelectCommand = cmd
        da.Fill(ds, "Orders")
        dgvOrders.DataSource = ds
        dgvOrders.DataMember = "Orders"

In that huge query the last item in the Where Clause is what I am having trouble with. I just want to pull Purchase orders that were made on the current days date. The database is SQL Server and the field is a DateTime Field. I am sure it is the way I have set the date but that is how it is set up in the SQL table.