Hi Saurabh
please verify your settings and make sure its correct
Source : http://www.sap-press.de/download/dateien/2530/sappress_printing_in_sap.pdf
Following documents is how to upload drivers in SAP
http://help.sap.com/saphelp_nw04s/helpdata/en/d9/4a956e51ea11d189570000e829fbbd/content.htm
http://help.sap.com/saphelp_nw04s/helpdata/en/b6/c0193c45f9fa13e10000000a114084/content.htm
Have you tested the printer using LOCL ?
Best Regards
Marius