Thanks for the replies guys. It was an odd issue. I was logging just fine with RR using my tactrix cable, just that the AEM input wasnt registering. I ended up just updating java and it worked.
I used RR trace debugging and noticed the plugins for the external sensors are controlled via java, so I updated it and everything is working.
Seriously frustrating seeing as I bought a bunch of cables, but hopefully this might help someone out in the future.