Serin2 & HSerin share modifiers you can use, but to use HSerin you must set the config bits in the PIC to specify you are using a hardware communication option instead of "bit banging" the serial comms using Serin2 (or Serin, for that matter).

Sorry, but you'll have to spend some more time in both the manual and the datasheet for your PIC to get it set up properly. Do a search in the Archives here in the forum, and with Google if you need more help. I've just about finished getting my comms working as I need, using these same procedures.

Good luck!
Brad