Well 1st things first I know what you're doing wrong, here download attached file, which is hermesv4b+PSN, when downloaded:
1. Extract then right click the file and send to ti device, select option to archive it when copying.
2. On calculator go to apps select the jailbreak obviously.
3. Select option 5
4. Choose only PSNHerm as your first payload and only payload.
5. Hit save.
6. Press 2 to install the hook.you now have option to press any key(don't)
7. That's it unplug ps3 plug back in, switch off, connect calculator switch on, then press power and eject. Have Fun