I am unable to write to BO or AO points in the DNP database of the module, what could be wrong?

A version of the DNP.CFG file got released that had the tag names for the PLC binary outputs and analog outputs incorrect.

To correct this, locate the tags labeled: "PLC binary output".  To correct this, add an S on the end to make it plural.  

Then locate the tags labeled: "PLC analog output", and make the same correction.  Add an S to make it plural, so it reads "PLC analog outputs", and the other tag reads "PLC binary Outputs".  That will fix the problem.