Krishna,
Are you using any National Instruments products? I believe that your question would be best directed to Microchip, who (I believe) makes the MPLAB IDE:
http://support.microchip.com. Additionally, you can look in the Users Guide that you're dealing with in the "Worldwide Sales and Support" section for specific offices.
If you are in fact using a National Instruments products, let us know which one so that we can appropriately address the issue.
Thanks,
Andy McRorie
NI R&D