Moving low-values to S999 field

I am using Micro Focus Enterprise Developer 2.2 Update 2 for Visual Studio 2010 with Microsoft Visual Basic 2010.

The COBOL dialect is: Enterprise COBOL for z/OS

Within a CICS program I am moving low-values to the entire map, which is customary in CICS.

But when the program hits this line: IF FIELDI = LOW-VALUES it does not find low-values. FIELDI is defined as S999.

Perhaps I am missing a directive in the "Additional Directives"?