dual patch electrophysiological recordings

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ppousinha
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dual patch electrophysiological recordings

Hi to all! I'm having some issues with clampex software program, more precisely the membrane test configuration. I want to do dual patch recordings in hippocampal slices coupled to a stimulatory electrod. I settled everything with all the BNC connections and I have two channels on MultiClamp 700B. I thought that changing the channel on Multiclamp would be enough to access the different recording electrodes on Membrane Test window, although that's not happening. There's something I must be missing, but no one at the institute is doing or has done this, and no information on this exist in the clampex guide.
Is there some one to help me?
Thanks in advance
Paula