nhibernate - LocalDB: transaction deadlock in unit tests? -

i'm using localdb database checking if mappings working ok (i'm using nhibernate+fluent nhibernate). now, have complex structure, items shared between several "aggregates". i've configure aggregates collections aren't loaded lazily , i've started getting transaction locks on 1 of unit tests. now, if run same code against sql server, works out correctly. know if there major differences between these 2 versions regarding locking?

btw, mapping tests wrapped in transactions rolled automatically @ end of tests. here's example of 1 of tests i'm trying execute:

using (var session = gestorligacoes.fabricasessoes.opensession()) {     using (var tran = session.begintransaction()) {         var area = area.nova(new novaarea(new acao("luis.abreu"), "teste", "area de testes"));         session.save(area);         session.flush();          var secretaria = new secretaria("secretaria", "sec", new acao("luis.abreu"));         secretaria.adicionaarea(new adicionaarea(new acao("luis.abreu"), secretaria.versao, area));          new persistencespecification<secretaria>(session)             .verifythemappings(secretaria);         tran.rollback();     } } 

thanks.

regards, luis