Printing Option of NAST table

Hi all,

I am using T.Code : MRRL .

I want to Print Document, When I m Saving Data of ERS of Invoice Varification.

I have Define Output Type ZERS : with Dispatch time '4'. But it is not getting printed same time.. i have to go T.Code : MR90 for Printing the Document.

I want this document printed at saving from T.Code : MRRL.

its making entry as '3' in NAST Table.

Its a very Urgent.

Thanx in Advance,

Shardul Shah