Basic question on Override files?

Hi,

I have a very basic COBOL program which reads from a file SCRIPT. The file SCRIPT has 2 versions, VERSION001 and VERSION002. From a CL program, to achieve processing the 2 versions in parallel I need to do the following:

1) Override VERSION001 of SCRIPT.
2) Do a SBMJOB to call the COBOL program (expecting to read values from VERSION001).
3) Override VERSION002 of SCRIPT.
4) Do a SBMJOB to call the COBOL program (expecting to read values from VERSION002).

I thought this was pretty basic stuff and should be a piece of cake. However, when I execute my CL program, both the instances of COBOL that I am running read from the default VERSION001.

Any pointers on what I am doing wrong?

Here is the OVRDBF command that I am using:

OVRDBF     FILE(SCRIPT) TOFILE(SCRIPT) +          
                   MBR(VERSION001) OVRSCOPE(*JOB) +            
                   SHARE(*YES) OPNSCOPE(*JOB)                  
                                                         
SBMJOB     CMD(CALL PGM(TESTING)) JOB(TEST_OVR1)  
                                                         
DLTOVR     FILE(*ALL) LVL(*JOB)                          
                                                         
OVRDBF     FILE(SCRIPT) TOFILE(RKUMAR/SCRIPT) +          
                   MBR(VERSION002) OVRSCOPE(*JOB) +            
                   SHARE(*YES) OPNSCOPE(*JOB)                  
                                                         
SBMJOB     CMD(CALL PGM(TESTING)) JOB(TEST_OVR2)  

Thanks for any guidance.

Regards
Ali.