I have a Isilon cluster running 9.2.1.7.  I have a directory that I want to give a user the ability of write/delete files and directories.  I can apply an ACL to the directory to apply it to existing files, however, I cannot determine how to get it to work on files that get added to the directory.  The command I used is listed below:

chmod +a user usera allow dir_gen_all directorya

TIA