Activation Groups, external sub procedures, and OVRDBF

I have looked in the archives but am unable to find an example similar to
mine, so here I go. . .

I have a situation where my OVRDBF isn't working and from my point of view I
have all of my ducks in a row.  I have PGM1 doing a CALLP to a sub procedure
named clCmdExec which executes the OVRDBF command I send into it.  For
example:

PGM1...
     C                   CallP      cLCmdExec('OVRDBF FILE(ORDHDR1)
TOFILE(PRODLIB/ORDHDR1)')


cLCmdExec (external module that is bound into PGM1) . . .
     P cLCmdExec...
     P                 B                   Export
     D cLCmdExec...
     D                 PI              N
     D  pCmd                       1024    Value Varying
     D  pLength                      15  5 Value Options(*NoPass)
     C                   If         %Parms = 1
     C                   Eval       pLength = %Len(%Trim(pCmd))
     C                   EndIf

     C                   Call      'QCMDEXC'                            99
     C                   Parm                    pCmd
     C                   Parm                    pLength

     C                   Return    *In99
     P                 E

I created PGM1 with DFTACTGRP(*NO) ACTGRP(*CALLER).
I created the service pgm cLCmdExec is in with ACTGRP(*CALLER).

The above doesn't override the file; when I open ORDHDR1 it grabs the first
ORDHDR1 in the library list which is in TESTLIB.  

The override _does_ work if I have the following in PGM1 instead of using a
sub procedure.

PGM1...
     C                   Eval      pCmd = 'OVRDBF FILE(ORDHDR1)
TOFILE(PRODLIB/ORDHDR1)'                             
     C                   Call      'QCMDEXC'                            99
     C                   Parm                    pCmd
     C                   Parm                    pLength

Could someone tell me how I might be compiling my programs wrong? or how I
might be using the OVRDBF wrong?  I have tried changing the override scope
on OVRDBF, but that didn't fix my problem.

Aaron Bartell