Removing background noise on only one of two tracks

Hello and thank you in advanced for your help. I am new to STP but well versed in FCP. I've recently discovered the wonderful feature of removing background noise in my video clips.
I'm having trouble with one instance though: I have footage shot with a microphone into only one channel of the camera. In FCP, I highlight that channel of audio and "send to" STP just as I have other clips. This time, however, no matter what I seem to try, both left and right audio channels show up in STP and I can't seem to separate them in order to remove the hiss from only one channel.
If I proceed as normal and select a portion of the hiss to set as "noise print" I can only select both tracks, not only the track I want. Probably a matter of a simple button, but I don't know STP well enough and the manual was no help. Anyway, continuing with the process to "reduce noise" and adjusting the parameters I hear almost no difference when turning the filter on and off.
I'm not sure if I've explained my scenario the best, but I'd appreciate some assistance.
Thank you!
Eric P

Eric,
Make sure the stereo file is open in the Editor as an Audio file. Click inside the editor window area and move your mouse pointer up to the top of the left channel's window border. If done correctly a tiny "L" will appear. This lets you know you can select the left channel, or portions of it.
Do the same for the right channel. However instead of moving the mouse pointer to the top area of the window, move it to the bottom of the Right channel's pane. Look for the tiny 'R."
Proceed as normal: Set a noise print, adjust parameters, and process. You'll find only the selected channel will be processed.
-paul.

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Removing background noise on only one of two tracks

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