append & link shape key

First, sorry for my english.
I have a model with shape key. When I link it in another file I lost the shape key. I think I link the bad thing (I link my model in “object”). How to append or link shape key?
I also tried to link the scene but nothing happen.
I read an another topic with the same subject but I don’t find the response so it’s for that I ask you.

I think it’s because I didn’t have action file and IPO file. Now I have it, so it’s ok.