I have a Behringer Xenyx1002 Mixer. I recently purchased a Behringer UCA202 adapter so that I can hook my mixer up to my computer. I have the mic hooked into the mixer with a 1/4" jack and then a set of RCA cables running from the LR output of the mixer into the LR input of the UCA202. It still does not seem to be feeding audio from my microphone into my computer. Am I missing a step?