I just got the new iMac 17" and I have loaded on Logic Express and cannot get it to work with my Midi. I use a Midiman controller through a Tascam 122 in thorugh USB. I can get the audio analog part of it to work, but it makes no Midi sound, although it receives the midi message and even records the Midi information, just no midi sound.

Any ideas on this?

umm... you need something to take the MIDI data and make the sound - an external MIDI synth or a software one (audio instrument tracks!) This is not Garageband here ahahaha

Arvidtp is right, you'll need to open up an instrument first, highlight the track and then play some midi in and yo'll get sound out..here, try ths tutorial...

Apple Logic Express instrument tutorial..

there's loads more on Apple site so check them out..

I'm not sure I know anyone who didn't do this the first time they hit Logic...

In the channel strip (on the left of your screen), you'll see that your track has slots for EQ, Inserts, Sends and I/O. Click and hold on the empty first slot of your I/O - this is for your input. From the pull downs you'll see things like 'mono' and 'stereo' etc.... under those you'll find your 'instruments', pick something like the EFM1 and hit your MIDI controller... now you'll hear some sounds...