app. cant open sounds

hello,

i recently put together few simple patches as application, everything
works fine but it wont open sound files from a chosen folder. all i
get is this message: cant open blblabla.aif

i dont get any error while building the application and i dont
understand why it does not work.

am i missing something??

the method i use to load files in the menu is the one below, if i use
different methods i get an error message when building the app.

thank you in advance for your help

j.