Parameter decimal-data error on submitted program

I'm hitting a serious brain fade here.  FWIW, we're on v5r2.

I have a CL program that has two numeric values.  The CL program then
submits a job, calling an RPGLE program with those numeric fields as
parameters.  The RPGLE program bombs with a decimal-data error.  The dump
shows the two values as having hex zeros.

When I change the CL program to call the RPGLE program directly using the
same parameters, and not submit it, it works fine.  (See example code
below.)

Is SBMJOB doing something to those numeric parameter values?

tia,
db


Pgm
      Dcl   &p_Month    *Dec  (     2  0 ) Value( 01 )
      Dcl   &p_Year     *Dec  (     4  0 ) Value( 2004 )

      SbmJob     Cmd( Call ARR101CTSR +
                   Parm( &p_Month &p_Year ))

      Call ARR101CTSR   Parm( &p_Month &p_Year )
Endpgm

ARR101CTSR:

  d Date            s              7  0
   * Entry parameters
  d p_Month         s              2  0
  d p_Year          s              4  0

  c     *Entry        Plist
  c                   Parm                    p_Month
  c                   Parm                    p_Year

  c                   Eval      Date = ( p_year - 1900 ) * 10000 +
  c                                           p_month * 100 + 01
  c                   Eval      *inLR = *On
  c                   Dump