Include my header files let's suppose I have folder called AES, in this folder is file "AES.ino" where is code and folder "AESLib" what is library. In "AESLib" is file called "AESLib.h", 

now when I try to include AESLib.h with

#include "AESLib/AESLib.h" 


in my AES.ino, then Arduino command line tool complain that its not able to find "AESLib.h"

Where could be the catch?

Thanks
I have the same problem using the Arduino IDE 1.5.6 beta.
Adding the library(s) using the menu (Sketch->include library->something) makes it work until the IDE is closed.