I am new on this forum, but I have a problem. In 2013 I bought for my children the train set 7938 and last Christmas I have added cargo train 60052. Both sets works excellent but we have a small issue with the remote control(s). Now we have two identical remote controls and both of them works the same. I mean only one side of the remote works and it moves both trains in the same time. I thought I could have one side of the remote working with 7938 and the other side with 60052. What can I do to properly use the remote? I have tried the switches from the engine/remotes, nothing, I have the same issue. Thanks!