Audio intrument in logic 6, I can't do it! Options

[nakedcasino]

Yes, yet another new mac/ logic user in terrible need of assistance.

Basically running Logic Express 6 on a G3 iBook, 800MHz, 256 Ram, OSX 2, M Audio Mobile Pre USB Core Audio Interface, Evolution MK 425 C USB Keyboard.

I want to solely use it for audio (recorded parts and samples) and Audio Instruments.

Now I installed it last night followed the installation manual to the letter.
The problems are:
When I insert an Audio Instrument (that is authorized) on an Audio Instrument track I cannot get any sound out of it. MIDI is being received by Logic and it recognizes that both the keyboard and the audio interface are present. MACOS recognizes they are there too and even gives me nice pictures of them. The Audio Interface works with iTunes and other system stuff but seemingly not with Logic. I haven't tried recording any audio into it yet.
Also on the GM MIDI Tracks and Audio Instrument tracks in the arrange window there is no little R (for record) next to them.
What's going on. Please help.
Emagic have been very helpful so far but I wondered if any of you pros knew what might be going on.
Cheers