Cant record into to logic pro 9 using samson l1200 live mixer, System/Pref/Audio input tab says selected device has no input control

Question

Hi Im new to this so bare with me..When I connect my Samson l1200 live usb mixer to my Imac 7,1 Intel duo core 3gb ram, osx10.6.8, via usb cable to record vocals/instruments, in System Pref/Audio/Output tab is set to mixer's UsbAudioCodec driver, (Im able to hear playback into headphones via the mixer, and hear the mic when spoken into it but cant record a track into Logic...System/Pref/Audio input tab says selected device has no input control, Ive set the input/output settings in Logic to UsbAudioCodec but still no good...Would it be either the way the mixer is set up? or is this mixer (Samson l1200) not compatible with my particular Imac? I hope I may be able to help as Im only a student trying to record my band thanks

Answer 1

I perfectly understand your problem.
First... just to make sure, in Logic's preferences /Audio make sure Universal Track Mode IS checked, it should be enabled. (I think it probably is just checking)
Second... if you record a track in a new Logic project and then go to the next track to record an overdubbed guitar part, are both parts recorded on the 2nd track?
What I'm asking is overdubbing working differently for two or three recorded tracks as opposed to overdubbing with an imported track.
What I think is happening is you have the main stereo output being recorded into Logic so if you playback an imported or recorded track from Logic while recording a 2nd track (overdub), both are going to be recorded on the 2nd track.
I took a look at the manual, here's the relevant sections.
34 – SEND – USB input send switch 
The USB INPUT switch allows you to select one of
two stereo (or two channel) signal paths to feed the
USB output to send to the connected PC. When the
INPUT switch is in the up position, the USB signal will
feed from the MAIN left right mix. When the INPUT
switch is in the down position, the USB signal will
feed from the AUX 1 and AUX 2 buses which enables
you to create a unique mix to send to the PC.
35 – RETURN – USB return switch
The USB RETURN switch allows you to select one of
two stereo return paths to receive USB audio from
the connected PC. When the ASSIGN switch is in the
up position, the USB signal will return to the MAIN
mix bus. When the ASSIGN switch is in the down
position, the USB signal will return to the last pair
of stereo channels which enables you to playback a
recorded track in the MAIN mix, and you can use the
channels AUX sends to feed any of the AUX buses.
This will let you hear the USB playback tracks in the
monitor mixes.
36 – MONITOR – USB headphone enable switch
Press the USB MONITOR switch down if you want
to hear the signal from the USB return in the
headphones.