Using Logix Express With Oxygen8 Keyboard Help. Options

[Yianni5k]

I just bought Logic express and I was wondering if it's possible to use the MIDI features and record music through the M-Audio Oxgen8 Keyboard which is connected via USB. I have Reason, and I'm able to use the Keyboard w/o an audio interface and record midi through the usb. When I hit record in Logic express it shows the notes I'm playing, but no sound is coming out. Please let me know if it's even possible to use logic with a usb/midi keyboard.

specs:
dual powermac g5
Logic express
M-Audio Oxygen8 keyboard
Soundstick speakers

thanks.