Cache problems

[Nuno Miguel Ribeiro Rosa]

Hi,   I’m having a problem when I make de call: _dao.QueryForObject(params) more than once with the same params I get this exception:   ´ System.ArgumentException: Item has already been added.  Key in dictionary: "842128374"  Key being added: "842128374" `   I’m defining cache=lru.   I’m newbie using Ibatis (.Net)… can anyone help, please?   Thanks,   Nuno Rosa PT-SI