In live trading, the parameters for the trading conditions are downloaded directly from the broker. My intuition is that your AssetsFix file isn't reflective of one of the brokers' trading conditions. To check this, connect to the broker and then open the file Assets.csv, which lives in the Log folder. This file will contain the trading conditions for the broker to which you most recently connected. The Data Import/Export page in the manual has lots of detail about this.