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BQ40Z50-R2: Pack only charges, when Smbus Communication is active

Part Number: BQ40Z50-R2

Dear E2E-Community, 

we designed a battery pack in a 4S1P configuration, with a BQ40z50-R2. 

We achieved a successful learning cycle, with correct Update Status and active balancing. But if we try to charge the pack there is no current flow, if there is no Smbus Communication. 

I'm not sure, which Protection Setting inhibts the charging, so I would really appreciate some help, od advise. Best Regards and Thanks in advance, 

The golden Files are attached to this Post in a Zip-File

Felix