Smart from process and Print preview issue

Hi Every one,

Good after noon .

I have developed a smart form for the output type 'ZDRM', it is working fine.My requirement is when i click 'Process' the spool request is to be generated and click on 'Preview' preview should be open.

I did like this and passing to smart form.

  wa_cparam-no_dialog = 'X'.

  wa_cparam-device = 'PRINTER'.

  wa_output-tddest = 'LP01'."'LOCA'.

  wa_output-tdimmed   = 'X'.

  wa_output-tdnoprint = 'X'.

  wa_cparam-preview = 'X'.

But problem is when i click on 'Preview' preview is opened successfully,and click on 'Process' it is showing preview first and generating spool after closing the preview.

How can i suppress preview when clicking on process.

Thanks&Regards,

Suresh.