Expression Maps Not Loading

I know I am not the first one to have problems with expression maps, but here goes. I have 10.5 Pro and have created and also bought expression maps. Many times when I load my template, the expression maps for some (sometimes all) of my instruments (I write orchestral music) are not there and I have to reload them. Anybody else seen anything like this and give me some ideas where to look. This has been going on for awhile and frankly I am about to give up expression maps, even I really love the idea of them when they work. Many thanks in advanceā€¦