Dynamic Date Selection for Background Jobs in SAP ECC 770. Support needed.

Hey!
Hope my connection finds you well. 
I wanted to inquire for enactment with beneath query. Could you delight person a look into that?

Background contented description:
When I manually tally T-code MB51 and prime variant, the dates set correctly based connected my dynamic day settings. However, erstwhile this study is executed arsenic a inheritance job, the dates stay static and bash not update dynamically. In result, study is nonstop with improper dates arsenic strategy is not dynamically adjusting dates. 

My needs:
I privation to recognize and hole occupation with static day successful automatic inheritance occupation (I privation day country to beryllium changed each clip the occupation is running). 

Can you enactment maine with that please? I americium not sure, wherever I americium doing mistake. 

Detailed information: (please consciousness escaped to inquire astir different accusation - I americium trying not to get into heavy details). 

1. I person setup variant successful MB51 with Dynamic Date enactment connected field  (2 past days). 
Screenshot below:

2. I had setup Run successful inheritance occupation (with usage of Program ->Execute successful background)

Date/Time -> Period Values -> Daily -> Save

3. Review and set occupation successful inheritance with usage of SM37

I had setup details related to sending inheritance occupation results into specified mailbox according to beneath instruction:

http://scn.sap.com/docs/DOC-44263

Background occupation is sending results into precise email address, nevertheless it's sending each the clip the aforesaid country of day (dynamic day enactment is not moving here). 

Can you delight assistance maine to setup Dynamic day enactment for Background job?