Help with RE2 on the PS3

Downloaded RE2 on my PS3.
Beat the game with Leon.

At this point if it was the original game, I'd switch discs to play as Claire right? Well I DL'd it.
I try to select the 'Switch Discs' option from the guide, but it wont let me.
Help pl0x.

http://boardsus.playstation.com/t5/Resident-Evil-Series/Resident-Evil-2-PSN-disc-switch-problem-solved/m-p/44517958