Insert/update error Code from ASP.NET web browser

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ASP.NET

hi
I have this code and am trying to update/inset information int the database using the browser but i get this error message."Could not find installable ISAM" what could be the problem ? please advise

Dim con As New OleDbConnection(WebConfigurationManager.ConnectionStrings("Arnold").ConnectionString)
        con.Open()
        Dim Allocate As New OleDbCommand
        Allocate.Connection = con
        Allocate.CommandText = "INSERT INTO TradeInCarTBL(RegNumber,Customer,Make,Model,Color,Type,Transmission,Mileage,Year,Price,Dealer) VALUES('" & TxtRegno.Text & "'," & Txtcustomer.Text & "," & DDLmake.Text & "," & DDLmodel.Text & "," & DDLcolor.Text & "," & DDLType.Text & "," & DDLTransmission.Text & "," & DDLmileage.Text & "," & DDLYear.Text & "," & Txtprice.Text & "," & DDLDealer.Text & ")"
        Allocate.ExecuteNonQuery()
        Response.Redirect("Login.ASPX")