Hi Haresh,
You need to have stayed in Canada for at least 2 years (730 days) out of the past 5 years in order to maintain your PR status. My parents have been here for 2 years and 3 days (733) in the past 5 years and they meet the residency requirement, even though it's only by a few days. They have had many issues with family members back home that they needed to attend to. In addition, my mother had retinal bleeding and dislocated her shoulder, so they were advised not to travel until she recovered. As a result, they weren't able to travel for an entire year. However, we ensured that they met the minimum requirement and thought that by meeting this requirement, their case would quickly be processed and there would be no issues.
However, their file has also been sent to the local CIC office. Their file was sent on July 25, 2012, and we haven't heard anything from them until now. From the messages I have received, it takes a very long time.
I am not sure I can advise you about what you should do. The experts on the forum are better equipped to help you. Leon suggested some options for you. Good luck with everything.
Karen