Dreamweaver CC creates Recordsets with Null. before the table name

Hi, I have this weird problem.
When I try to create or even edit a recordset, automatically all the tables I can select once I choose the connection are reported to me with "Null." before the table name. Obviously if I go for a test I get an error on the string syntax

Connection: Conn_1
Table:  Null.Orders
           Null.User
           Null Vendor
           Null.Countries

I connect with ADODB to accdb access database.

From code then I go to change all the names, but I did not understand what the problem is due to.
Can someone help me?
Thank you