Add a job cost related field to AR report in Crystal Reports

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I am trying to add the "JobDesc" field to our AR Aged Invoice Report so that we can see what job name corresponds with the invoice on the report. I'm a beginner in Crystal Reports, but here is what I've tried:

In Crystal Reports designer, I created a copy of the AR Aged Invoice Report to edit. Since "JobDesc" isn't a field within the AR Aged Invoice Report, I opened Database Expert and added the "JC_JobLIstingWrk" table to the selected tables. I've checked the links many times and I BELIEVE I have all the matching records from the two tables linked (SortField, GroupField, JobNo, etc.). When I add the "JobDesc" field to the report, it doesn't print anything in that field on the report. Is there something I'm missing? I found some articles about adding a field through Custom Office\User-Defined Field and Table Maintenance, but "JobDesc" isn't an available field to add since it's a field more related to Job Cost.