I've found solution to my problem. When I use ADO AddNew/Update then it's all working fine.
I've tried with this code:
Code:
Set rsAdd = Server.CreateObject("ADODB.Recordset")
strSQL = "SELECT my_name, my_lastname FROM tbl_users"
rsAdd.Open strSQL, conn, 1, 3
rsAdd.AddNew
rsAdd("my_name") = strName
rsAdd("my_lastname") = strLastName
rsAdd.Update
Now i can insert what ever I want to my database field.