SAP ADOBE FORMS NOT PRINTING ON BOTH SIDES

Hi Friends,

I have one Adobe form which needs to print on both sides on the paper.

--> The printer preference is set as '2 SIDED'

--> The SPAD config is maintained as DUPLEX( Double sided )

--> Inside the form I have mentioned in the MASTER PAGE as 'TWO SIDED PRINTING'

      and also the subform which will come in the next page as 'TWO SIDED PRINTING'.

BUT still form is printing on 2 separate pages. I have one script which prints parallaly  with the adobe form. The script is printing on both sides but

the form is always coming on 2 separate pages.

I need to print this ADOBE form as double sided as hundreds of copies are gonna be printed and it will result in huge loss of paper.