How do I specify NAD83<->NAD27 grid shift files for FME Server?

I've received this error -- Implicit NAD27<->NAD83 grid shifts may not be performed until Canadian or US grids are chosen -- running a workbench in FME Server that contains a CSMapReprojector reprojecting from NAD83 to NAD27. I remember choosing the US grid shift when installing workbench on my desktop, but don't recall an option for choosing this when installing FME Server. I think some information is given on how to rectify this in FME Server in the log file, but it is not adequate for me.