Garritan Persona Orchestra And Keyboard Options

[jolat]

I have an eMac with OSX 10.3.4. I have installed Garritan Personal
Orchestra and all OK (even if the player of Native the Instrument he
closes himself frequently-maybe is not adapted to the last operating
system). I have but some problem: I have connected mine keyboard Korg
iS50B to the Mac through the M-audio MidiSport 2X2 USB interface, for
being able to command to the GPO in modality Stand-halone, but he does
not listen null. The keys move but the beautifull sounds
are not listen. I have installed then the Kontakt player (than me he
seems very stabler), but when play on the keyboard I feel overlapped
the sounds of the program with those of the tastiera.What mistake? I
must use an other type of interface? I have tried also to open them
with Digital Performer but he does not work: it goes in crash.
Help me.bye