Files not showing up when streaming from Hub to PS3

I have the WDTV Live Hub with the latest firmware (2.04.13). Streaming with Twonky, the PS3 was able to pick up the server but the PS3 can’t see .iso files. Only .avi and .mkv files format show up.  Please help.

Hub (computer room) ----------------------------------stream with Twonky--------------------> PS3 (TV in the living room)

                                                                                                                        only see the folder with .avi & .mkv files in it.

                                                                                                                             can’t see folder with .iso files

That’s because it’s not possible to stream ISO files via DLNA servers.