Os X & Traktor, Help with external Hard Drive Options

[JK47]

Hi Everyone

I've got a 1.67 ghz 17inch Powerbook with OS X Panther running Traktor 2.0, I also have a LaCie 250gb USB2 external drive which stores my music files.
Rather than copy the music across from the LaCie, i would like to use it as the primary music source with Traktor - However, within the explore window of Trakor i can't see it and therefore can't access the music. Is there any thing i'm missing or should do to get it to work? (i can see and use the Lacie drive in other programs).

Any advice is greatly appreciated as i'm a bit wet behind the ears when it comes to all things Apple (recent convert)

Thanks
JK