Trigger smartform multiple times from nace

Dear Expert,

I m working for T.Code ML83 (Service Sheet).....

Previously, for this T.Code SAPSCRIPT was using.... But now, I have developed a smartform and configured Smartform name in NACE and using Z Report which is already using same for PO Print. Its working fine. But when along with same parameters

I am calling my new smartform(ML83) using parameters EBELN , smartforms triggering again an again. I mean, if i have 10 line item

i need to press 10 times on print preview and it comes on first select query of smartform. I need, it finish all the queries of smartform once, it should display output . I m not getting, what is the problem now.... Pl help me .

Thanks & Reards,

Swapnika