was googling for help on my issue and found link to 'get expert help on playstation network', so here goes.

I bought a brand new PS2 slim and new Guitar Hero 2 two days ago. Finished all the songs on easy mode with no technical problems. the next day when i started on medium mode, the PS2 started taking over a minute to load each song and while playing the song the game would freeze up for a second or two several times during the song. now I can't play any songs with out it freezing up all the time while playing.

Is it the PS2 or the Game? Should I return both and try again?