Hi nobeefstu, thanks again for your reply. I've tried a few variations (only with different file sizes) and I've created two different files. The original EXE is about 2,67 GB and the sounds did not work. The second file is about 1,99 GB (i've deleted some photos) and it works perfectly with the sound files. The main problem is that it's impossible to upload this project because the client doesn't allow this. It still seems that this problem causes from the size of the EXE file ... Regards, Klaus