Hello Roger,
I've been thinking of using an Ipad for my sheet music as it would save a great deal of hassle when playing out. However, on making various enquiries, most people I spoke with advised me not to go for an Apple Ipad as you are restricted to using their Apps/software which can only be bought from them. Whereas if I buy a Pad that uses the Android system, not only do they have hundreds of free Apps but they can be used with almost every other Pad in the market today.
As you have an Ipad, I'm wondering whether this could be your problem. As you say, the KN7 is now 10 years old and maybe a conversion of some sort is needed before it'll work with anything modern such as the Ipad. (similar to the Technic styles that have been converted for use on other keyboards).
Just a thought!
Audrey