Hello Arun,
Thanks for contacting National Instruments. I have already answered your duplicate post at: http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HFORCEKWTID=118896:5&HOID=506500000008000000F4F60000&HExpertOnly=&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0 .
For future reference, please post to only one of the boards and try not to submit duplicate posts. An Applications Engineer will look at and try to answer your post, regardless of its location or duplicates.
Thanks!
A Saha
Applications Engineer
National Instruments
Anu Saha
Academic Product Marketing Engineer
National Instruments