Need help with PLX Wideband

#1
I have a PLX Wideband and a PLX Multi gauge. I am using it as a standalone. With the engine off it seems to be working right.
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With the engine running only the lead lights light up. Not sure what is wrong? Any ideas? I bought the wideband and the gauge used separately. So that adds to the problem of figuring out what is wrong. Thanks for any help.