Logic Pro 9 ESX24 should load up instrument but only plays default sine patch



Everytime I load up my pre-made instrument full of samples. None of the samples will play only the default sine patch plays even though the samples are loaded and mapped to each key correctly. However if I load in all the samples and build the instrument again from scratch they all work again.

It's really baffling me as I'm sure I'm doing everything correct here
1) are you sure you are saving the instrument file in EXS?
2) Are you sure reloading it once you are done saving it?

Seems obvious, but I have had the same issues in the past by not doing either one of these steps properly.