Transaction Timeout -> fine in dev ,no in stage

Hello,
I've a sp that takes some time to execute (It calculates a lot of positions on DB), from SQL Management studio takes 10 minutes, executing it from my developing platform (we've the DB that's over la intranet) tooks around 16minutes... and it works...when I execute it on the stage enviorment I got a transaction timed out....

for both the methos is the same

  public OperationResult Generate(DateTime scadenza, Action onSuccess = null, Action<Exception> onFail = null)
        {
            var query = entityManagerProvider.Manager.myqueryQuery(12345,date);

            TransactionSettings settings = new TransactionSettings(System.Transactions.IsolationLevel.Serializable, new TimeSpan(0, 0, 30, 0, 0));

            QueryStrategy qs = new QueryStrategy(QueryStrategy.DataSourceOnly, settings);

            query.CommandTimeout = 1800;
            var op = query.With(qs).ExecuteAsync();

            return op.OnComplete(onSuccess, onFail).AsOperationResult();
        }

I've also checked the wcf timeout...they're ok...
I don't know where to look at
Thanks

Hello,