Presently I determined how you can connect with my FTP with apache present with download things (enter IP not the ftp.xxx adress). However I'm able to an FileNotFound, eventhough it truly is there and it has everything set to 777

I already saw that apache is adding the "/" by themself so normally It will work, uploading isn't any problem. Any ideas? I'm able to open the file basically come in during my URL bar

You need to produce a file in your body, something similar to:

File f = new File("path/to/file");
if (f.exists() == false)
{
   f.createNewFile();
}
FileOutputStream fos = new FileOutputStream(f.getAbsoluteFile());
client.retrieveFile("Filenametoretrieve", fos);