I am trying to use iphone5 as a slave to an iPad for following changes live during a set. We both have the appropriate in-app purchases. Initially after following the instructions, as a practice run, the two devices worked but with a varying delay of between 3 and 10 seconds. This gradually became much longer, as much as 10 to 20 seconds. Then when trying to use the two devices on a live set the master iPad powered down and the slave froze. After powering up again, the same thing happened again after about a minute. Next we switched off the slave iphone, and from there on there was no problem. The only thing which might be relevant that I can think of, is that the slave has almost no data(only one song as a test)in its database whereas the master iPad has lots of songs(probably hundreds of songs). Oh yes, both devices had plenty of battery reserve. Not sure what versions are being used but all apps and downloads are fairly recent. Any ideas please?