unable to obtain list of tables from the data source when doing a step-by-step label Mail Merge in Word...

I'm getting the "unable to obtain list of tables from the data source" after logging into the SOTAMAS90 ODBC, when trying to do a step-by-step Mail Merge in Word.

This process worked when we were using the 2014 version, but after the 2015 upgrade, it has not worked.