VBA To Query A Access Database

i am trying to use VBA to query a access database that i have i want to be able to pull the information that matchs either textbox4 or 5 i am using the code below but i am getting global errors.

Private Sub CommandButton1_Click()
Dim custname As Variant
Dim Custnum As Variant
Dim cnn As New ADODB.Connection
Dim rst As New ADODB.Recordset
custname = Range("TextBox5").Text
Custnum = Range("TextBox4").Text
With ActiveSheet.QueryTables.Add(Connection:=Array( _
"ODBC;DSN=Insolvency;Description=Insolvency;APP=Microsoft Office XP;DATABASE=Insolvency;Trusted_Connection=YES"), Destination:=Range("Listbox1"))
.CommandText = Array("SELECT * FROM POST WHERE Customer_Account_Name=" & custname & " AND Customer_Account_Number = '" & Custnum & "' ORDER BY Customer_Account_Number")
.Name = "Insolvency Post Query"..........................