Hey mate, are you on the new rebug firmware? If so, it doesn't work on there
Sorry. If not, I am unsure as to why. Though I have heard on some PS3's it doesn't work on 1080p, so give it a try, go to Display Settings > HDMI > Untick any of the following- 1080p, 1080i, 720p and tick the lowest one, and it should work. If it does, just go through the unban process and go back and change it to 1080p again, unfortunately you may have to do this each time you reboot your PS3.
Hey man, add my skype and I will talk there.