Hi Boyan,
Actually you have things kind of backwards. To start with none of the strategies in the Portfolio have slashes in front of them. This allows them to trade. This is why they were trading in the demo account. Then in the live account to STOP certain strategies from trading slashes are put in front of them in the source code of the Portfolio. After the slashes are placed then the source code needs to be compiled. Now, the strategies with the slashes placed in the source code will become INACTIVE. All other strategies will continue to trade.
Alan,