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BQ40Z50-R2: Help reviewing Schematic for battery monitoring system

Part Number: BQ40Z50-R2

Hello,

This design is based off of the the reference design for the bq40z50EVM, but meant to only collect data on the state of the connected cells.

I have previously had sucessful communications with the host device and the EV2400 interface adapter using the BQ40Z50EVM evaluation module.  
However when I test my own implementation with these tools the BMS is not discoverable on the bus and I am unable to receive any replies when commands are issued to it.

below is an image of my schematic. Any ideas why it would not be communicating?